diff --git a/core-service/internal/api/handlers/items.go b/core-service/internal/api/handlers/items.go
new file mode 100644
index 0000000..1bdc061
--- /dev/null
+++ b/core-service/internal/api/handlers/items.go
@@ -0,0 +1,172 @@
+package handlers
+
+import (
+	"net/http"
+
+	"erp-mvp/core-service/internal/api/middleware"
+	"erp-mvp/core-service/internal/models"
+	"erp-mvp/core-service/internal/service"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-playground/validator/v10"
+	"github.com/google/uuid"
+)
+
+type ItemHandler struct {
+	itemService service.ItemService
+	validate    *validator.Validate
+}
+
+func NewItemHandler(itemService service.ItemService) *ItemHandler {
+	return &ItemHandler{
+		itemService: itemService,
+		validate:    validator.New(),
+	}
+}
+
+// GetItems получает все товары организации
+func (h *ItemHandler) GetItems(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	items, err := h.itemService.GetItems(c.Request.Context(), claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get items"})
+		return
+	}
+
+	c.JSON(http.StatusOK, items)
+}
+
+// CreateItem создает новый товар
+func (h *ItemHandler) CreateItem(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	var req models.CreateItemRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	item, err := h.itemService.CreateItem(c.Request.Context(), claims.OrganizationID, &req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create item"})
+		return
+	}
+
+	c.JSON(http.StatusCreated, item)
+}
+
+// GetItem получает товар по ID
+func (h *ItemHandler) GetItem(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	idStr := c.Param("id")
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid item ID"})
+		return
+	}
+
+	item, err := h.itemService.GetItem(c.Request.Context(), id, claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Item not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, item)
+}
+
+// UpdateItem обновляет товар
+func (h *ItemHandler) UpdateItem(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	idStr := c.Param("id")
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid item ID"})
+		return
+	}
+
+	var req models.CreateItemRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	item, err := h.itemService.UpdateItem(c.Request.Context(), id, claims.OrganizationID, &req)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Item not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, item)
+}
+
+// DeleteItem удаляет товар
+func (h *ItemHandler) DeleteItem(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	idStr := c.Param("id")
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid item ID"})
+		return
+	}
+
+	if err := h.itemService.DeleteItem(c.Request.Context(), id, claims.OrganizationID); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Item not found"})
+		return
+	}
+
+	c.JSON(http.StatusNoContent, nil)
+}
+
+// SearchItems ищет товары
+func (h *ItemHandler) SearchItems(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	query := c.Query("q")
+	category := c.Query("category")
+
+	items, err := h.itemService.SearchItems(c.Request.Context(), claims.OrganizationID, query, category)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to search items"})
+		return
+	}
+
+	c.JSON(http.StatusOK, items)
+}
diff --git a/core-service/internal/api/handlers/locations.go b/core-service/internal/api/handlers/locations.go
new file mode 100644
index 0000000..fb65f11
--- /dev/null
+++ b/core-service/internal/api/handlers/locations.go
@@ -0,0 +1,176 @@
+package handlers
+
+import (
+	"net/http"
+
+	"erp-mvp/core-service/internal/api/middleware"
+	"erp-mvp/core-service/internal/models"
+	"erp-mvp/core-service/internal/service"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-playground/validator/v10"
+	"github.com/google/uuid"
+)
+
+type LocationHandler struct {
+	locationService service.LocationService
+	validate        *validator.Validate
+}
+
+func NewLocationHandler(locationService service.LocationService) *LocationHandler {
+	return &LocationHandler{
+		locationService: locationService,
+		validate:        validator.New(),
+	}
+}
+
+// GetLocations получает все места хранения организации
+func (h *LocationHandler) GetLocations(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	locations, err := h.locationService.GetLocations(c.Request.Context(), claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get locations"})
+		return
+	}
+
+	c.JSON(http.StatusOK, locations)
+}
+
+// CreateLocation создает новое место хранения
+func (h *LocationHandler) CreateLocation(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	var req models.CreateLocationRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	location, err := h.locationService.CreateLocation(c.Request.Context(), claims.OrganizationID, &req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create location"})
+		return
+	}
+
+	c.JSON(http.StatusCreated, location)
+}
+
+// GetLocation получает место хранения по ID
+func (h *LocationHandler) GetLocation(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	idStr := c.Param("id")
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid location ID"})
+		return
+	}
+
+	location, err := h.locationService.GetLocation(c.Request.Context(), id, claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Location not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, location)
+}
+
+// UpdateLocation обновляет место хранения
+func (h *LocationHandler) UpdateLocation(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	idStr := c.Param("id")
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid location ID"})
+		return
+	}
+
+	var req models.CreateLocationRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	location, err := h.locationService.UpdateLocation(c.Request.Context(), id, claims.OrganizationID, &req)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Location not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, location)
+}
+
+// DeleteLocation удаляет место хранения
+func (h *LocationHandler) DeleteLocation(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	idStr := c.Param("id")
+	id, err := uuid.Parse(idStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid location ID"})
+		return
+	}
+
+	if err := h.locationService.DeleteLocation(c.Request.Context(), id, claims.OrganizationID); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Location not found"})
+		return
+	}
+
+	c.JSON(http.StatusNoContent, nil)
+}
+
+// GetChildren получает дочерние места хранения
+func (h *LocationHandler) GetChildren(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	parentIDStr := c.Param("id")
+	parentID, err := uuid.Parse(parentIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid parent location ID"})
+		return
+	}
+
+	children, err := h.locationService.GetChildren(c.Request.Context(), parentID, claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Parent location not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, children)
+}
diff --git a/core-service/internal/api/handlers/operations.go b/core-service/internal/api/handlers/operations.go
new file mode 100644
index 0000000..4c02afa
--- /dev/null
+++ b/core-service/internal/api/handlers/operations.go
@@ -0,0 +1,227 @@
+package handlers
+
+import (
+	"net/http"
+
+	"erp-mvp/core-service/internal/api/middleware"
+	"erp-mvp/core-service/internal/models"
+	"erp-mvp/core-service/internal/service"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-playground/validator/v10"
+	"github.com/google/uuid"
+)
+
+type OperationsHandler struct {
+	operationsService service.OperationsService
+	validate          *validator.Validate
+}
+
+func NewOperationsHandler(operationsService service.OperationsService) *OperationsHandler {
+	return &OperationsHandler{
+		operationsService: operationsService,
+		validate:          validator.New(),
+	}
+}
+
+// PlaceItem размещает товар в месте хранения
+func (h *OperationsHandler) PlaceItem(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	var req models.PlaceItemRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	placement, err := h.operationsService.PlaceItem(c.Request.Context(), claims.OrganizationID, &req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to place item"})
+		return
+	}
+
+	c.JSON(http.StatusCreated, placement)
+}
+
+// MoveItem перемещает товар в другое место хранения
+func (h *OperationsHandler) MoveItem(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	placementIDStr := c.Param("id")
+	placementID, err := uuid.Parse(placementIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid placement ID"})
+		return
+	}
+
+	var req struct {
+		NewLocationID uuid.UUID `json:"new_location_id" validate:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	if err := h.operationsService.MoveItem(c.Request.Context(), placementID, req.NewLocationID, claims.OrganizationID); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Placement not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "Item moved successfully"})
+}
+
+// GetItemPlacements получает все размещения товара
+func (h *OperationsHandler) GetItemPlacements(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	itemIDStr := c.Param("item_id")
+	itemID, err := uuid.Parse(itemIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid item ID"})
+		return
+	}
+
+	placements, err := h.operationsService.GetItemPlacements(c.Request.Context(), itemID, claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Item not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, placements)
+}
+
+// GetLocationPlacements получает все товары в месте хранения
+func (h *OperationsHandler) GetLocationPlacements(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	locationIDStr := c.Param("location_id")
+	locationID, err := uuid.Parse(locationIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid location ID"})
+		return
+	}
+
+	placements, err := h.operationsService.GetLocationPlacements(c.Request.Context(), locationID, claims.OrganizationID)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Location not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, placements)
+}
+
+// UpdateQuantity обновляет количество товара в размещении
+func (h *OperationsHandler) UpdateQuantity(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	placementIDStr := c.Param("id")
+	placementID, err := uuid.Parse(placementIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid placement ID"})
+		return
+	}
+
+	var req struct {
+		Quantity int `json:"quantity" validate:"required,min=1"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
+		return
+	}
+
+	if err := h.operationsService.UpdateQuantity(c.Request.Context(), placementID, req.Quantity, claims.OrganizationID); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Placement not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "Quantity updated successfully"})
+}
+
+// DeletePlacement удаляет размещение товара
+func (h *OperationsHandler) DeletePlacement(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	placementIDStr := c.Param("id")
+	placementID, err := uuid.Parse(placementIDStr)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid placement ID"})
+		return
+	}
+
+	if err := h.operationsService.DeletePlacement(c.Request.Context(), placementID, claims.OrganizationID); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Placement not found"})
+		return
+	}
+
+	c.JSON(http.StatusNoContent, nil)
+}
+
+// Search выполняет поиск товаров с местами размещения
+func (h *OperationsHandler) Search(c *gin.Context) {
+	claims := middleware.GetClaims(c)
+	if claims == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+		return
+	}
+
+	var req models.SearchRequest
+	if err := c.ShouldBindQuery(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid query parameters"})
+		return
+	}
+
+	// Устанавливаем значения по умолчанию
+	if req.Page <= 0 {
+		req.Page = 1
+	}
+	if req.PageSize <= 0 {
+		req.PageSize = 20
+	}
+
+	response, err := h.operationsService.Search(c.Request.Context(), claims.OrganizationID, &req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to search"})
+		return
+	}
+
+	c.JSON(http.StatusOK, response)
+}
diff --git a/core-service/internal/api/middleware/auth.go b/core-service/internal/api/middleware/auth.go
index 046149c..613f108 100644
--- a/core-service/internal/api/middleware/auth.go
+++ b/core-service/internal/api/middleware/auth.go
@@ -6,6 +6,7 @@ import (
 
 	"erp-mvp/core-service/internal/auth"
 	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
 )
 
 type AuthMiddleware struct {
@@ -55,3 +56,33 @@ func (m *AuthMiddleware) AuthRequired() gin.HandlerFunc {
 		c.Next()
 	}
 }
+
+// GetClaims получает claims из контекста Gin
+func GetClaims(c *gin.Context) *auth.Claims {
+	userID, exists := c.Get("user_id")
+	if !exists {
+		return nil
+	}
+	
+	orgID, exists := c.Get("organization_id")
+	if !exists {
+		return nil
+	}
+	
+	email, exists := c.Get("email")
+	if !exists {
+		return nil
+	}
+	
+	role, exists := c.Get("role")
+	if !exists {
+		return nil
+	}
+	
+	return &auth.Claims{
+		UserID:         userID.(uuid.UUID),
+		OrganizationID: orgID.(uuid.UUID),
+		Email:          email.(string),
+		Role:           role.(string),
+	}
+}
diff --git a/core-service/internal/api/server.go b/core-service/internal/api/server.go
index 55331bd..6b397dc 100644
--- a/core-service/internal/api/server.go
+++ b/core-service/internal/api/server.go
@@ -23,10 +23,16 @@ type Server struct {
 	router *gin.Engine
 
 	// Services
-	authService service.AuthService
+	authService      service.AuthService
+	locationService  service.LocationService
+	itemService      service.ItemService
+	operationsService service.OperationsService
 
 	// Handlers
-	authHandler *handlers.AuthHandler
+	authHandler      *handlers.AuthHandler
+	locationHandler  *handlers.LocationHandler
+	itemHandler      *handlers.ItemHandler
+	operationsHandler *handlers.OperationsHandler
 
 	// Middleware
 	authMiddleware *middleware.AuthMiddleware
@@ -39,24 +45,39 @@ func NewServer(cfg *config.Config, db *sql.DB, log logger.Logger) *Server {
 	// Инициализируем репозитории
 	orgRepo := repository.NewOrganizationRepository(db)
 	userRepo := repository.NewUserRepository(db)
+	locationRepo := repository.NewLocationRepository(db)
+	itemRepo := repository.NewItemRepository(db)
+	operationsRepo := repository.NewOperationsRepository(db)
 
 	// Инициализируем сервисы
 	authService := service.NewAuthService(orgRepo, userRepo, jwtService)
+	locationService := service.NewLocationService(locationRepo)
+	itemService := service.NewItemService(itemRepo)
+	operationsService := service.NewOperationsService(operationsRepo, itemRepo, locationRepo)
 
 	// Инициализируем handlers
 	authHandler := handlers.NewAuthHandler(authService)
+	locationHandler := handlers.NewLocationHandler(locationService)
+	itemHandler := handlers.NewItemHandler(itemService)
+	operationsHandler := handlers.NewOperationsHandler(operationsService)
 
 	// Инициализируем middleware
 	authMiddleware := middleware.NewAuthMiddleware(jwtService)
 
 	server := &Server{
-		config:         cfg,
-		db:             db,
-		logger:         log,
-		router:         gin.Default(),
-		authService:    authService,
-		authHandler:    authHandler,
-		authMiddleware: authMiddleware,
+		config:            cfg,
+		db:                db,
+		logger:            log,
+		router:            gin.Default(),
+		authService:       authService,
+		locationService:   locationService,
+		itemService:       itemService,
+		operationsService: operationsService,
+		authHandler:       authHandler,
+		locationHandler:   locationHandler,
+		itemHandler:       itemHandler,
+		operationsHandler: operationsHandler,
+		authMiddleware:    authMiddleware,
 	}
 
 	server.setupRoutes()
@@ -86,23 +107,29 @@ func (s *Server) setupRoutes() {
 			protected.PUT("/organizations/:id", s.updateOrganization)
 
 			// Locations
-			protected.GET("/locations", s.getLocations)
-			protected.POST("/locations", s.createLocation)
-			protected.GET("/locations/:id", s.getLocation)
-			protected.PUT("/locations/:id", s.updateLocation)
-			protected.DELETE("/locations/:id", s.deleteLocation)
+			protected.GET("/locations", s.locationHandler.GetLocations)
+			protected.POST("/locations", s.locationHandler.CreateLocation)
+			protected.GET("/locations/:id", s.locationHandler.GetLocation)
+			protected.PUT("/locations/:id", s.locationHandler.UpdateLocation)
+			protected.DELETE("/locations/:id", s.locationHandler.DeleteLocation)
+			protected.GET("/locations/:id/children", s.locationHandler.GetChildren)
 
 			// Items
-			protected.GET("/items", s.getItems)
-			protected.POST("/items", s.createItem)
-			protected.GET("/items/:id", s.getItem)
-			protected.PUT("/items/:id", s.updateItem)
-			protected.DELETE("/items/:id", s.deleteItem)
+			protected.GET("/items", s.itemHandler.GetItems)
+			protected.POST("/items", s.itemHandler.CreateItem)
+			protected.GET("/items/:id", s.itemHandler.GetItem)
+			protected.PUT("/items/:id", s.itemHandler.UpdateItem)
+			protected.DELETE("/items/:id", s.itemHandler.DeleteItem)
+			protected.GET("/items/search", s.itemHandler.SearchItems)
 
 			// Operations
-			protected.POST("/operations/place-item", s.placeItem)
-			protected.POST("/operations/move-item", s.moveItem)
-			protected.GET("/operations/search", s.search)
+			protected.POST("/operations/place-item", s.operationsHandler.PlaceItem)
+			protected.POST("/operations/move-item/:id", s.operationsHandler.MoveItem)
+			protected.GET("/operations/search", s.operationsHandler.Search)
+			protected.GET("/operations/items/:item_id/placements", s.operationsHandler.GetItemPlacements)
+			protected.GET("/operations/locations/:location_id/placements", s.operationsHandler.GetLocationPlacements)
+			protected.PUT("/operations/placements/:id/quantity", s.operationsHandler.UpdateQuantity)
+			protected.DELETE("/operations/placements/:id", s.operationsHandler.DeletePlacement)
 
 			// Templates
 			protected.GET("/templates", s.getTemplates)
@@ -127,58 +154,6 @@ func (s *Server) updateOrganization(c *gin.Context) {
 	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
 }
 
-func (s *Server) getLocations(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) createLocation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) getLocation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) updateLocation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) deleteLocation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) getItems(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) createItem(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) getItem(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) updateItem(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) deleteItem(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) placeItem(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) moveItem(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
-func (s *Server) search(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
-}
-
 func (s *Server) getTemplates(c *gin.Context) {
 	c.JSON(http.StatusNotImplemented, gin.H{"error": "Not implemented yet"})
 }
diff --git a/core-service/internal/models/models.go b/core-service/internal/models/models.go
index 75ee9f3..c8a6068 100644
--- a/core-service/internal/models/models.go
+++ b/core-service/internal/models/models.go
@@ -129,8 +129,8 @@ type SearchRequest struct {
 
 // SearchResponse результат поиска
 type SearchResponse struct {
-	Items      []ItemWithLocation `json:"items"`
-	TotalCount int                `json:"total_count"`
+	Items      []*ItemWithLocation `json:"items"`
+	TotalCount int                 `json:"total_count"`
 }
 
 // ItemWithLocation товар с информацией о месте размещения
diff --git a/core-service/internal/repository/items.go b/core-service/internal/repository/items.go
new file mode 100644
index 0000000..86aecc3
--- /dev/null
+++ b/core-service/internal/repository/items.go
@@ -0,0 +1,223 @@
+package repository
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+
+	"erp-mvp/core-service/internal/models"
+	"github.com/google/uuid"
+)
+
+type ItemRepository interface {
+	Create(ctx context.Context, item *models.Item) error
+	GetByID(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.Item, error)
+	GetByOrganization(ctx context.Context, orgID uuid.UUID) ([]*models.Item, error)
+	Update(ctx context.Context, item *models.Item) error
+	Delete(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error
+	Search(ctx context.Context, orgID uuid.UUID, query string, category string) ([]*models.Item, error)
+}
+
+type itemRepository struct {
+	db *sql.DB
+}
+
+func NewItemRepository(db *sql.DB) ItemRepository {
+	return &itemRepository{db: db}
+}
+
+func (r *itemRepository) Create(ctx context.Context, item *models.Item) error {
+	query := `
+		INSERT INTO items (id, organization_id, name, description, category, created_at)
+		VALUES ($1, $2, $3, $4, $5, $6)
+	`
+	
+	_, err := r.db.ExecContext(ctx, query,
+		item.ID,
+		item.OrganizationID,
+		item.Name,
+		item.Description,
+		item.Category,
+		item.CreatedAt,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create item: %w", err)
+	}
+	
+	return nil
+}
+
+func (r *itemRepository) GetByID(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.Item, error) {
+	query := `
+		SELECT id, organization_id, name, description, category, created_at
+		FROM items
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	item := &models.Item{}
+	err := r.db.QueryRowContext(ctx, query, id, orgID).Scan(
+		&item.ID,
+		&item.OrganizationID,
+		&item.Name,
+		&item.Description,
+		&item.Category,
+		&item.CreatedAt,
+	)
+	
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, fmt.Errorf("item not found")
+		}
+		return nil, fmt.Errorf("failed to get item: %w", err)
+	}
+	
+	return item, nil
+}
+
+func (r *itemRepository) GetByOrganization(ctx context.Context, orgID uuid.UUID) ([]*models.Item, error) {
+	query := `
+		SELECT id, organization_id, name, description, category, created_at
+		FROM items
+		WHERE organization_id = $1
+		ORDER BY name
+	`
+	
+	rows, err := r.db.QueryContext(ctx, query, orgID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query items: %w", err)
+	}
+	defer rows.Close()
+	
+	var items []*models.Item
+	for rows.Next() {
+		item := &models.Item{}
+		err := rows.Scan(
+			&item.ID,
+			&item.OrganizationID,
+			&item.Name,
+			&item.Description,
+			&item.Category,
+			&item.CreatedAt,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan item: %w", err)
+		}
+		
+		items = append(items, item)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating items: %w", err)
+	}
+	
+	return items, nil
+}
+
+func (r *itemRepository) Update(ctx context.Context, item *models.Item) error {
+	query := `
+		UPDATE items
+		SET name = $3, description = $4, category = $5
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	result, err := r.db.ExecContext(ctx, query,
+		item.ID,
+		item.OrganizationID,
+		item.Name,
+		item.Description,
+		item.Category,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to update item: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("item not found")
+	}
+	
+	return nil
+}
+
+func (r *itemRepository) Delete(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error {
+	query := `
+		DELETE FROM items
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	result, err := r.db.ExecContext(ctx, query, id, orgID)
+	if err != nil {
+		return fmt.Errorf("failed to delete item: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("item not found")
+	}
+	
+	return nil
+}
+
+func (r *itemRepository) Search(ctx context.Context, orgID uuid.UUID, query string, category string) ([]*models.Item, error) {
+	baseQuery := `
+		SELECT id, organization_id, name, description, category, created_at
+		FROM items
+		WHERE organization_id = $1
+	`
+	
+	var args []interface{}
+	args = append(args, orgID)
+	argIndex := 2
+	
+	if query != "" {
+		baseQuery += fmt.Sprintf(" AND (name ILIKE $%d OR description ILIKE $%d)", argIndex, argIndex)
+		args = append(args, "%"+query+"%")
+		argIndex++
+	}
+	
+	if category != "" {
+		baseQuery += fmt.Sprintf(" AND category = $%d", argIndex)
+		args = append(args, category)
+		argIndex++
+	}
+	
+	baseQuery += " ORDER BY name"
+	
+	rows, err := r.db.QueryContext(ctx, baseQuery, args...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to search items: %w", err)
+	}
+	defer rows.Close()
+	
+	var items []*models.Item
+	for rows.Next() {
+		item := &models.Item{}
+		err := rows.Scan(
+			&item.ID,
+			&item.OrganizationID,
+			&item.Name,
+			&item.Description,
+			&item.Category,
+			&item.CreatedAt,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan item: %w", err)
+		}
+		
+		items = append(items, item)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating search results: %w", err)
+	}
+	
+	return items, nil
+}
diff --git a/core-service/internal/repository/locations.go b/core-service/internal/repository/locations.go
new file mode 100644
index 0000000..6b2f00c
--- /dev/null
+++ b/core-service/internal/repository/locations.go
@@ -0,0 +1,270 @@
+package repository
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+
+	"erp-mvp/core-service/internal/models"
+	"github.com/google/uuid"
+)
+
+type LocationRepository interface {
+	Create(ctx context.Context, location *models.StorageLocation) error
+	GetByID(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.StorageLocation, error)
+	GetByOrganization(ctx context.Context, orgID uuid.UUID) ([]*models.StorageLocation, error)
+	Update(ctx context.Context, location *models.StorageLocation) error
+	Delete(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error
+	GetChildren(ctx context.Context, parentID uuid.UUID, orgID uuid.UUID) ([]*models.StorageLocation, error)
+}
+
+type locationRepository struct {
+	db *sql.DB
+}
+
+func NewLocationRepository(db *sql.DB) LocationRepository {
+	return &locationRepository{db: db}
+}
+
+func (r *locationRepository) Create(ctx context.Context, location *models.StorageLocation) error {
+	query := `
+		INSERT INTO storage_locations (id, organization_id, parent_id, name, address, type, coordinates, created_at)
+		VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+	`
+	
+	// Конвертируем JSON в строку
+	var coordinatesJSON string
+	if location.Coordinates != nil {
+		coords, err := json.Marshal(location.Coordinates)
+		if err != nil {
+			return fmt.Errorf("failed to marshal coordinates: %w", err)
+		}
+		coordinatesJSON = string(coords)
+	}
+	
+	_, err := r.db.ExecContext(ctx, query,
+		location.ID,
+		location.OrganizationID,
+		location.ParentID,
+		location.Name,
+		location.Address,
+		location.Type,
+		coordinatesJSON,
+		location.CreatedAt,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create storage location: %w", err)
+	}
+	
+	return nil
+}
+
+func (r *locationRepository) GetByID(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.StorageLocation, error) {
+	query := `
+		SELECT id, organization_id, parent_id, name, address, type, coordinates, created_at
+		FROM storage_locations
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	var coordinatesJSON []byte
+	location := &models.StorageLocation{}
+	err := r.db.QueryRowContext(ctx, query, id, orgID).Scan(
+		&location.ID,
+		&location.OrganizationID,
+		&location.ParentID,
+		&location.Name,
+		&location.Address,
+		&location.Type,
+		&coordinatesJSON,
+		&location.CreatedAt,
+	)
+	
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, fmt.Errorf("storage location not found")
+		}
+		return nil, fmt.Errorf("failed to get storage location: %w", err)
+	}
+	
+	// Конвертируем JSON строку в map
+	if len(coordinatesJSON) > 0 {
+		err = json.Unmarshal(coordinatesJSON, &location.Coordinates)
+		if err != nil {
+			return nil, fmt.Errorf("failed to unmarshal coordinates: %w", err)
+		}
+	} else {
+		location.Coordinates = make(models.JSON)
+	}
+	
+	return location, nil
+}
+
+func (r *locationRepository) GetByOrganization(ctx context.Context, orgID uuid.UUID) ([]*models.StorageLocation, error) {
+	query := `
+		SELECT id, organization_id, parent_id, name, address, type, coordinates, created_at
+		FROM storage_locations
+		WHERE organization_id = $1
+		ORDER BY name
+	`
+	
+	rows, err := r.db.QueryContext(ctx, query, orgID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query storage locations: %w", err)
+	}
+	defer rows.Close()
+	
+	var locations []*models.StorageLocation
+	for rows.Next() {
+		var coordinatesJSON []byte
+		location := &models.StorageLocation{}
+		err := rows.Scan(
+			&location.ID,
+			&location.OrganizationID,
+			&location.ParentID,
+			&location.Name,
+			&location.Address,
+			&location.Type,
+			&coordinatesJSON,
+			&location.CreatedAt,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan storage location: %w", err)
+		}
+		
+		// Конвертируем JSON строку в map
+		if len(coordinatesJSON) > 0 {
+			err = json.Unmarshal(coordinatesJSON, &location.Coordinates)
+			if err != nil {
+				return nil, fmt.Errorf("failed to unmarshal coordinates: %w", err)
+			}
+		} else {
+			location.Coordinates = make(models.JSON)
+		}
+		
+		locations = append(locations, location)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating storage locations: %w", err)
+	}
+	
+	return locations, nil
+}
+
+func (r *locationRepository) Update(ctx context.Context, location *models.StorageLocation) error {
+	query := `
+		UPDATE storage_locations
+		SET parent_id = $3, name = $4, address = $5, type = $6, coordinates = $7
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	// Конвертируем JSON в строку
+	var coordinatesJSON string
+	if location.Coordinates != nil {
+		coords, err := json.Marshal(location.Coordinates)
+		if err != nil {
+			return fmt.Errorf("failed to marshal coordinates: %w", err)
+		}
+		coordinatesJSON = string(coords)
+	}
+	
+	result, err := r.db.ExecContext(ctx, query,
+		location.ID,
+		location.OrganizationID,
+		location.ParentID,
+		location.Name,
+		location.Address,
+		location.Type,
+		coordinatesJSON,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to update storage location: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("storage location not found")
+	}
+	
+	return nil
+}
+
+func (r *locationRepository) Delete(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error {
+	query := `
+		DELETE FROM storage_locations
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	result, err := r.db.ExecContext(ctx, query, id, orgID)
+	if err != nil {
+		return fmt.Errorf("failed to delete storage location: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("storage location not found")
+	}
+	
+	return nil
+}
+
+func (r *locationRepository) GetChildren(ctx context.Context, parentID uuid.UUID, orgID uuid.UUID) ([]*models.StorageLocation, error) {
+	query := `
+		SELECT id, organization_id, parent_id, name, address, type, coordinates, created_at
+		FROM storage_locations
+		WHERE parent_id = $1 AND organization_id = $2
+		ORDER BY name
+	`
+	
+	rows, err := r.db.QueryContext(ctx, query, parentID, orgID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query child locations: %w", err)
+	}
+	defer rows.Close()
+	
+	var locations []*models.StorageLocation
+	for rows.Next() {
+		var coordinatesJSON []byte
+		location := &models.StorageLocation{}
+		err := rows.Scan(
+			&location.ID,
+			&location.OrganizationID,
+			&location.ParentID,
+			&location.Name,
+			&location.Address,
+			&location.Type,
+			&coordinatesJSON,
+			&location.CreatedAt,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan child location: %w", err)
+		}
+		
+		// Конвертируем JSON строку в map
+		if len(coordinatesJSON) > 0 {
+			err = json.Unmarshal(coordinatesJSON, &location.Coordinates)
+			if err != nil {
+				return nil, fmt.Errorf("failed to unmarshal coordinates: %w", err)
+			}
+		} else {
+			location.Coordinates = make(models.JSON)
+		}
+		
+		locations = append(locations, location)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating child locations: %w", err)
+	}
+	
+	return locations, nil
+}
diff --git a/core-service/internal/repository/operations.go b/core-service/internal/repository/operations.go
new file mode 100644
index 0000000..5cf26db
--- /dev/null
+++ b/core-service/internal/repository/operations.go
@@ -0,0 +1,315 @@
+package repository
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+
+	"erp-mvp/core-service/internal/models"
+	"github.com/google/uuid"
+)
+
+type OperationsRepository interface {
+	PlaceItem(ctx context.Context, placement *models.ItemPlacement) error
+	MoveItem(ctx context.Context, placementID uuid.UUID, newLocationID uuid.UUID, orgID uuid.UUID) error
+	GetByItem(ctx context.Context, itemID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error)
+	GetByLocation(ctx context.Context, locationID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error)
+	GetByID(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.ItemPlacement, error)
+	UpdateQuantity(ctx context.Context, id uuid.UUID, quantity int, orgID uuid.UUID) error
+	Delete(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error
+	Search(ctx context.Context, orgID uuid.UUID, query string, category string, address string) ([]*models.ItemWithLocation, error)
+}
+
+type operationsRepository struct {
+	db *sql.DB
+}
+
+func NewOperationsRepository(db *sql.DB) OperationsRepository {
+	return &operationsRepository{db: db}
+}
+
+func (r *operationsRepository) PlaceItem(ctx context.Context, placement *models.ItemPlacement) error {
+	query := `
+		INSERT INTO item_placements (id, organization_id, item_id, location_id, quantity, created_at)
+		VALUES ($1, $2, $3, $4, $5, $6)
+	`
+	
+	_, err := r.db.ExecContext(ctx, query,
+		placement.ID,
+		placement.OrganizationID,
+		placement.ItemID,
+		placement.LocationID,
+		placement.Quantity,
+		placement.CreatedAt,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to place item: %w", err)
+	}
+	
+	return nil
+}
+
+func (r *operationsRepository) MoveItem(ctx context.Context, placementID uuid.UUID, newLocationID uuid.UUID, orgID uuid.UUID) error {
+	query := `
+		UPDATE item_placements
+		SET location_id = $2
+		WHERE id = $1 AND organization_id = $3
+	`
+	
+	result, err := r.db.ExecContext(ctx, query, placementID, newLocationID, orgID)
+	if err != nil {
+		return fmt.Errorf("failed to move item: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("item placement not found")
+	}
+	
+	return nil
+}
+
+func (r *operationsRepository) GetByItem(ctx context.Context, itemID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error) {
+	query := `
+		SELECT id, organization_id, item_id, location_id, quantity, created_at
+		FROM item_placements
+		WHERE item_id = $1 AND organization_id = $2
+		ORDER BY created_at DESC
+	`
+	
+	rows, err := r.db.QueryContext(ctx, query, itemID, orgID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query item placements: %w", err)
+	}
+	defer rows.Close()
+	
+	var placements []*models.ItemPlacement
+	for rows.Next() {
+		placement := &models.ItemPlacement{}
+		err := rows.Scan(
+			&placement.ID,
+			&placement.OrganizationID,
+			&placement.ItemID,
+			&placement.LocationID,
+			&placement.Quantity,
+			&placement.CreatedAt,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan item placement: %w", err)
+		}
+		
+		placements = append(placements, placement)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating item placements: %w", err)
+	}
+	
+	return placements, nil
+}
+
+func (r *operationsRepository) GetByLocation(ctx context.Context, locationID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error) {
+	query := `
+		SELECT id, organization_id, item_id, location_id, quantity, created_at
+		FROM item_placements
+		WHERE location_id = $1 AND organization_id = $2
+		ORDER BY created_at DESC
+	`
+	
+	rows, err := r.db.QueryContext(ctx, query, locationID, orgID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to query location placements: %w", err)
+	}
+	defer rows.Close()
+	
+	var placements []*models.ItemPlacement
+	for rows.Next() {
+		placement := &models.ItemPlacement{}
+		err := rows.Scan(
+			&placement.ID,
+			&placement.OrganizationID,
+			&placement.ItemID,
+			&placement.LocationID,
+			&placement.Quantity,
+			&placement.CreatedAt,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan item placement: %w", err)
+		}
+		
+		placements = append(placements, placement)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating location placements: %w", err)
+	}
+	
+	return placements, nil
+}
+
+func (r *operationsRepository) GetByID(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.ItemPlacement, error) {
+	query := `
+		SELECT id, organization_id, item_id, location_id, quantity, created_at
+		FROM item_placements
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	placement := &models.ItemPlacement{}
+	err := r.db.QueryRowContext(ctx, query, id, orgID).Scan(
+		&placement.ID,
+		&placement.OrganizationID,
+		&placement.ItemID,
+		&placement.LocationID,
+		&placement.Quantity,
+		&placement.CreatedAt,
+	)
+	
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil, fmt.Errorf("item placement not found")
+		}
+		return nil, fmt.Errorf("failed to get item placement: %w", err)
+	}
+	
+	return placement, nil
+}
+
+func (r *operationsRepository) UpdateQuantity(ctx context.Context, id uuid.UUID, quantity int, orgID uuid.UUID) error {
+	query := `
+		UPDATE item_placements
+		SET quantity = $2
+		WHERE id = $1 AND organization_id = $3
+	`
+	
+	result, err := r.db.ExecContext(ctx, query, id, quantity, orgID)
+	if err != nil {
+		return fmt.Errorf("failed to update quantity: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("item placement not found")
+	}
+	
+	return nil
+}
+
+func (r *operationsRepository) Delete(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error {
+	query := `
+		DELETE FROM item_placements
+		WHERE id = $1 AND organization_id = $2
+	`
+	
+	result, err := r.db.ExecContext(ctx, query, id, orgID)
+	if err != nil {
+		return fmt.Errorf("failed to delete item placement: %w", err)
+	}
+	
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("failed to get rows affected: %w", err)
+	}
+	
+	if rowsAffected == 0 {
+		return fmt.Errorf("item placement not found")
+	}
+	
+	return nil
+}
+
+func (r *operationsRepository) Search(ctx context.Context, orgID uuid.UUID, query string, category string, address string) ([]*models.ItemWithLocation, error) {
+	baseQuery := `
+		SELECT 
+			i.id, i.organization_id, i.name, i.description, i.category, i.created_at,
+			sl.id, sl.organization_id, sl.parent_id, sl.name, sl.address, sl.type, sl.coordinates, sl.created_at,
+			ip.quantity
+		FROM items i
+		JOIN item_placements ip ON i.id = ip.item_id
+		JOIN storage_locations sl ON ip.location_id = sl.id
+		WHERE i.organization_id = $1 AND sl.organization_id = $1
+	`
+	
+	var args []interface{}
+	args = append(args, orgID)
+	argIndex := 2
+	
+	if query != "" {
+		baseQuery += fmt.Sprintf(" AND (i.name ILIKE $%d OR i.description ILIKE $%d)", argIndex, argIndex)
+		args = append(args, "%"+query+"%")
+		argIndex++
+	}
+	
+	if category != "" {
+		baseQuery += fmt.Sprintf(" AND i.category = $%d", argIndex)
+		args = append(args, category)
+		argIndex++
+	}
+	
+	if address != "" {
+		baseQuery += fmt.Sprintf(" AND sl.address ILIKE $%d", argIndex)
+		args = append(args, "%"+address+"%")
+		argIndex++
+	}
+	
+	baseQuery += " ORDER BY i.name, sl.name"
+	
+	rows, err := r.db.QueryContext(ctx, baseQuery, args...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to search items with locations: %w", err)
+	}
+	defer rows.Close()
+	
+	var results []*models.ItemWithLocation
+	for rows.Next() {
+		var coordinatesJSON []byte
+		itemWithLocation := &models.ItemWithLocation{}
+		
+		err := rows.Scan(
+			&itemWithLocation.Item.ID,
+			&itemWithLocation.Item.OrganizationID,
+			&itemWithLocation.Item.Name,
+			&itemWithLocation.Item.Description,
+			&itemWithLocation.Item.Category,
+			&itemWithLocation.Item.CreatedAt,
+			&itemWithLocation.Location.ID,
+			&itemWithLocation.Location.OrganizationID,
+			&itemWithLocation.Location.ParentID,
+			&itemWithLocation.Location.Name,
+			&itemWithLocation.Location.Address,
+			&itemWithLocation.Location.Type,
+			&coordinatesJSON,
+			&itemWithLocation.Location.CreatedAt,
+			&itemWithLocation.Quantity,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan item with location: %w", err)
+		}
+		
+		// Конвертируем JSON строку в map
+		if len(coordinatesJSON) > 0 {
+			err = json.Unmarshal(coordinatesJSON, &itemWithLocation.Location.Coordinates)
+			if err != nil {
+				return nil, fmt.Errorf("failed to unmarshal coordinates: %w", err)
+			}
+		} else {
+			itemWithLocation.Location.Coordinates = make(models.JSON)
+		}
+		
+		results = append(results, itemWithLocation)
+	}
+	
+	if err = rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating search results: %w", err)
+	}
+	
+	return results, nil
+}
diff --git a/core-service/internal/service/item_service.go b/core-service/internal/service/item_service.go
new file mode 100644
index 0000000..0559a49
--- /dev/null
+++ b/core-service/internal/service/item_service.go
@@ -0,0 +1,126 @@
+package service
+
+import (
+	"context"
+	"time"
+
+	"erp-mvp/core-service/internal/models"
+	"erp-mvp/core-service/internal/repository"
+
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+)
+
+type ItemService interface {
+	CreateItem(ctx context.Context, orgID uuid.UUID, req *models.CreateItemRequest) (*models.Item, error)
+	GetItem(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.Item, error)
+	GetItems(ctx context.Context, orgID uuid.UUID) ([]*models.Item, error)
+	UpdateItem(ctx context.Context, id uuid.UUID, orgID uuid.UUID, req *models.CreateItemRequest) (*models.Item, error)
+	DeleteItem(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error
+	SearchItems(ctx context.Context, orgID uuid.UUID, query string, category string) ([]*models.Item, error)
+}
+
+type itemService struct {
+	itemRepo repository.ItemRepository
+	logger   *logrus.Logger
+}
+
+func NewItemService(itemRepo repository.ItemRepository) ItemService {
+	return &itemService{
+		itemRepo: itemRepo,
+		logger:   logrus.New(),
+	}
+}
+
+func (s *itemService) CreateItem(ctx context.Context, orgID uuid.UUID, req *models.CreateItemRequest) (*models.Item, error) {
+	s.logger.Info("Creating item for organization: ", orgID)
+	
+	item := &models.Item{
+		ID:             uuid.New(),
+		OrganizationID: orgID,
+		Name:           req.Name,
+		Description:    req.Description,
+		Category:       req.Category,
+		CreatedAt:      time.Now(),
+	}
+	
+	if err := s.itemRepo.Create(ctx, item); err != nil {
+		s.logger.Error("Failed to create item: ", err)
+		return nil, err
+	}
+	
+	s.logger.Info("Item created successfully: ", item.ID)
+	return item, nil
+}
+
+func (s *itemService) GetItem(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.Item, error) {
+	s.logger.Info("Getting item: ", id, " for organization: ", orgID)
+	
+	item, err := s.itemRepo.GetByID(ctx, id, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get item: ", err)
+		return nil, err
+	}
+	
+	return item, nil
+}
+
+func (s *itemService) GetItems(ctx context.Context, orgID uuid.UUID) ([]*models.Item, error) {
+	s.logger.Info("Getting all items for organization: ", orgID)
+	
+	items, err := s.itemRepo.GetByOrganization(ctx, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get items: ", err)
+		return nil, err
+	}
+	
+	return items, nil
+}
+
+func (s *itemService) UpdateItem(ctx context.Context, id uuid.UUID, orgID uuid.UUID, req *models.CreateItemRequest) (*models.Item, error) {
+	s.logger.Info("Updating item: ", id, " for organization: ", orgID)
+	
+	// Сначала получаем существующий товар
+	item, err := s.itemRepo.GetByID(ctx, id, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get item for update: ", err)
+		return nil, err
+	}
+	
+	// Обновляем поля
+	item.Name = req.Name
+	item.Description = req.Description
+	item.Category = req.Category
+	
+	if err := s.itemRepo.Update(ctx, item); err != nil {
+		s.logger.Error("Failed to update item: ", err)
+		return nil, err
+	}
+	
+	s.logger.Info("Item updated successfully: ", item.ID)
+	return item, nil
+}
+
+func (s *itemService) DeleteItem(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error {
+	s.logger.Info("Deleting item: ", id, " for organization: ", orgID)
+	
+	if err := s.itemRepo.Delete(ctx, id, orgID); err != nil {
+		s.logger.Error("Failed to delete item: ", err)
+		return err
+	}
+	
+	s.logger.Info("Item deleted successfully: ", id)
+	return nil
+}
+
+func (s *itemService) SearchItems(ctx context.Context, orgID uuid.UUID, query string, category string) ([]*models.Item, error) {
+	s.logger.Info("Searching items for organization: ", orgID, " query: ", query, " category: ", category)
+	
+	items, err := s.itemRepo.Search(ctx, orgID, query, category)
+	if err != nil {
+		s.logger.Error("Failed to search items: ", err)
+		return nil, err
+	}
+	
+	return items, nil
+}
diff --git a/core-service/internal/service/location_service.go b/core-service/internal/service/location_service.go
new file mode 100644
index 0000000..cdcd136
--- /dev/null
+++ b/core-service/internal/service/location_service.go
@@ -0,0 +1,130 @@
+package service
+
+import (
+	"context"
+	"time"
+
+	"erp-mvp/core-service/internal/models"
+	"erp-mvp/core-service/internal/repository"
+
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+)
+
+type LocationService interface {
+	CreateLocation(ctx context.Context, orgID uuid.UUID, req *models.CreateLocationRequest) (*models.StorageLocation, error)
+	GetLocation(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.StorageLocation, error)
+	GetLocations(ctx context.Context, orgID uuid.UUID) ([]*models.StorageLocation, error)
+	UpdateLocation(ctx context.Context, id uuid.UUID, orgID uuid.UUID, req *models.CreateLocationRequest) (*models.StorageLocation, error)
+	DeleteLocation(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error
+	GetChildren(ctx context.Context, parentID uuid.UUID, orgID uuid.UUID) ([]*models.StorageLocation, error)
+}
+
+type locationService struct {
+	locationRepo repository.LocationRepository
+	logger       *logrus.Logger
+}
+
+func NewLocationService(locationRepo repository.LocationRepository) LocationService {
+	return &locationService{
+		locationRepo: locationRepo,
+		logger:       logrus.New(),
+	}
+}
+
+func (s *locationService) CreateLocation(ctx context.Context, orgID uuid.UUID, req *models.CreateLocationRequest) (*models.StorageLocation, error) {
+	s.logger.Info("Creating location for organization: ", orgID)
+	
+	location := &models.StorageLocation{
+		ID:             uuid.New(),
+		OrganizationID: orgID,
+		ParentID:       req.ParentID,
+		Name:           req.Name,
+		Address:        req.Address,
+		Type:           req.Type,
+		Coordinates:    req.Coordinates,
+		CreatedAt:      time.Now(),
+	}
+	
+	if err := s.locationRepo.Create(ctx, location); err != nil {
+		s.logger.Error("Failed to create location: ", err)
+		return nil, err
+	}
+	
+	s.logger.Info("Location created successfully: ", location.ID)
+	return location, nil
+}
+
+func (s *locationService) GetLocation(ctx context.Context, id uuid.UUID, orgID uuid.UUID) (*models.StorageLocation, error) {
+	s.logger.Info("Getting location: ", id, " for organization: ", orgID)
+	
+	location, err := s.locationRepo.GetByID(ctx, id, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get location: ", err)
+		return nil, err
+	}
+	
+	return location, nil
+}
+
+func (s *locationService) GetLocations(ctx context.Context, orgID uuid.UUID) ([]*models.StorageLocation, error) {
+	s.logger.Info("Getting all locations for organization: ", orgID)
+	
+	locations, err := s.locationRepo.GetByOrganization(ctx, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get locations: ", err)
+		return nil, err
+	}
+	
+	return locations, nil
+}
+
+func (s *locationService) UpdateLocation(ctx context.Context, id uuid.UUID, orgID uuid.UUID, req *models.CreateLocationRequest) (*models.StorageLocation, error) {
+	s.logger.Info("Updating location: ", id, " for organization: ", orgID)
+	
+	// Сначала получаем существующую локацию
+	location, err := s.locationRepo.GetByID(ctx, id, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get location for update: ", err)
+		return nil, err
+	}
+	
+	// Обновляем поля
+	location.ParentID = req.ParentID
+	location.Name = req.Name
+	location.Address = req.Address
+	location.Type = req.Type
+	location.Coordinates = req.Coordinates
+	
+	if err := s.locationRepo.Update(ctx, location); err != nil {
+		s.logger.Error("Failed to update location: ", err)
+		return nil, err
+	}
+	
+	s.logger.Info("Location updated successfully: ", location.ID)
+	return location, nil
+}
+
+func (s *locationService) DeleteLocation(ctx context.Context, id uuid.UUID, orgID uuid.UUID) error {
+	s.logger.Info("Deleting location: ", id, " for organization: ", orgID)
+	
+	if err := s.locationRepo.Delete(ctx, id, orgID); err != nil {
+		s.logger.Error("Failed to delete location: ", err)
+		return err
+	}
+	
+	s.logger.Info("Location deleted successfully: ", id)
+	return nil
+}
+
+func (s *locationService) GetChildren(ctx context.Context, parentID uuid.UUID, orgID uuid.UUID) ([]*models.StorageLocation, error) {
+	s.logger.Info("Getting children for location: ", parentID, " in organization: ", orgID)
+	
+	children, err := s.locationRepo.GetChildren(ctx, parentID, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get children: ", err)
+		return nil, err
+	}
+	
+	return children, nil
+}
diff --git a/core-service/internal/service/operations_service.go b/core-service/internal/service/operations_service.go
new file mode 100644
index 0000000..6cf149c
--- /dev/null
+++ b/core-service/internal/service/operations_service.go
@@ -0,0 +1,192 @@
+package service
+
+import (
+	"context"
+	"time"
+
+	"erp-mvp/core-service/internal/models"
+	"erp-mvp/core-service/internal/repository"
+
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+)
+
+type OperationsService interface {
+	PlaceItem(ctx context.Context, orgID uuid.UUID, req *models.PlaceItemRequest) (*models.ItemPlacement, error)
+	MoveItem(ctx context.Context, placementID uuid.UUID, newLocationID uuid.UUID, orgID uuid.UUID) error
+	GetItemPlacements(ctx context.Context, itemID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error)
+	GetLocationPlacements(ctx context.Context, locationID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error)
+	UpdateQuantity(ctx context.Context, placementID uuid.UUID, quantity int, orgID uuid.UUID) error
+	DeletePlacement(ctx context.Context, placementID uuid.UUID, orgID uuid.UUID) error
+	Search(ctx context.Context, orgID uuid.UUID, req *models.SearchRequest) (*models.SearchResponse, error)
+}
+
+type operationsService struct {
+	operationsRepo repository.OperationsRepository
+	itemRepo       repository.ItemRepository
+	locationRepo   repository.LocationRepository
+	logger         *logrus.Logger
+}
+
+func NewOperationsService(operationsRepo repository.OperationsRepository, itemRepo repository.ItemRepository, locationRepo repository.LocationRepository) OperationsService {
+	return &operationsService{
+		operationsRepo: operationsRepo,
+		itemRepo:       itemRepo,
+		locationRepo:   locationRepo,
+		logger:         logrus.New(),
+	}
+}
+
+func (s *operationsService) PlaceItem(ctx context.Context, orgID uuid.UUID, req *models.PlaceItemRequest) (*models.ItemPlacement, error) {
+	s.logger.Info("Placing item: ", req.ItemID, " in location: ", req.LocationID, " for organization: ", orgID)
+	
+	// Проверяем, что товар существует и принадлежит организации
+	_, err := s.itemRepo.GetByID(ctx, req.ItemID, orgID)
+	if err != nil {
+		s.logger.Error("Item not found or not accessible: ", err)
+		return nil, err
+	}
+	
+	// Проверяем, что место хранения существует и принадлежит организации
+	_, err = s.locationRepo.GetByID(ctx, req.LocationID, orgID)
+	if err != nil {
+		s.logger.Error("Location not found or not accessible: ", err)
+		return nil, err
+	}
+	
+	placement := &models.ItemPlacement{
+		ID:             uuid.New(),
+		OrganizationID: orgID,
+		ItemID:         req.ItemID,
+		LocationID:     req.LocationID,
+		Quantity:       req.Quantity,
+		CreatedAt:      time.Now(),
+	}
+	
+	if err := s.operationsRepo.PlaceItem(ctx, placement); err != nil {
+		s.logger.Error("Failed to place item: ", err)
+		return nil, err
+	}
+	
+	s.logger.Info("Item placed successfully: ", placement.ID)
+	return placement, nil
+}
+
+func (s *operationsService) MoveItem(ctx context.Context, placementID uuid.UUID, newLocationID uuid.UUID, orgID uuid.UUID) error {
+	s.logger.Info("Moving item placement: ", placementID, " to location: ", newLocationID, " for organization: ", orgID)
+	
+	// Проверяем, что размещение существует и принадлежит организации
+	placement, err := s.operationsRepo.GetByID(ctx, placementID, orgID)
+	if err != nil {
+		s.logger.Error("Item placement not found or not accessible: ", err)
+		return err
+	}
+	
+	// Проверяем, что новое место хранения существует и принадлежит организации
+	_, err = s.locationRepo.GetByID(ctx, newLocationID, orgID)
+	if err != nil {
+		s.logger.Error("New location not found or not accessible: ", err)
+		return err
+	}
+	
+	if err := s.operationsRepo.MoveItem(ctx, placementID, newLocationID, orgID); err != nil {
+		s.logger.Error("Failed to move item: ", err)
+		return err
+	}
+	
+	s.logger.Info("Item moved successfully from location: ", placement.LocationID, " to: ", newLocationID)
+	return nil
+}
+
+func (s *operationsService) GetItemPlacements(ctx context.Context, itemID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error) {
+	s.logger.Info("Getting placements for item: ", itemID, " in organization: ", orgID)
+	
+	// Проверяем, что товар существует и принадлежит организации
+	_, err := s.itemRepo.GetByID(ctx, itemID, orgID)
+	if err != nil {
+		s.logger.Error("Item not found or not accessible: ", err)
+		return nil, err
+	}
+	
+	placements, err := s.operationsRepo.GetByItem(ctx, itemID, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get item placements: ", err)
+		return nil, err
+	}
+	
+	return placements, nil
+}
+
+func (s *operationsService) GetLocationPlacements(ctx context.Context, locationID uuid.UUID, orgID uuid.UUID) ([]*models.ItemPlacement, error) {
+	s.logger.Info("Getting placements for location: ", locationID, " in organization: ", orgID)
+	
+	// Проверяем, что место хранения существует и принадлежит организации
+	_, err := s.locationRepo.GetByID(ctx, locationID, orgID)
+	if err != nil {
+		s.logger.Error("Location not found or not accessible: ", err)
+		return nil, err
+	}
+	
+	placements, err := s.operationsRepo.GetByLocation(ctx, locationID, orgID)
+	if err != nil {
+		s.logger.Error("Failed to get location placements: ", err)
+		return nil, err
+	}
+	
+	return placements, nil
+}
+
+func (s *operationsService) UpdateQuantity(ctx context.Context, placementID uuid.UUID, quantity int, orgID uuid.UUID) error {
+	s.logger.Info("Updating quantity for placement: ", placementID, " to: ", quantity, " in organization: ", orgID)
+	
+	// Проверяем, что размещение существует и принадлежит организации
+	_, err := s.operationsRepo.GetByID(ctx, placementID, orgID)
+	if err != nil {
+		s.logger.Error("Item placement not found or not accessible: ", err)
+		return err
+	}
+	
+	if err := s.operationsRepo.UpdateQuantity(ctx, placementID, quantity, orgID); err != nil {
+		s.logger.Error("Failed to update quantity: ", err)
+		return err
+	}
+	
+	s.logger.Info("Quantity updated successfully for placement: ", placementID)
+	return nil
+}
+
+func (s *operationsService) DeletePlacement(ctx context.Context, placementID uuid.UUID, orgID uuid.UUID) error {
+	s.logger.Info("Deleting placement: ", placementID, " for organization: ", orgID)
+	
+	// Проверяем, что размещение существует и принадлежит организации
+	_, err := s.operationsRepo.GetByID(ctx, placementID, orgID)
+	if err != nil {
+		s.logger.Error("Item placement not found or not accessible: ", err)
+		return err
+	}
+	
+	if err := s.operationsRepo.Delete(ctx, placementID, orgID); err != nil {
+		s.logger.Error("Failed to delete placement: ", err)
+		return err
+	}
+	
+	s.logger.Info("Placement deleted successfully: ", placementID)
+	return nil
+}
+
+func (s *operationsService) Search(ctx context.Context, orgID uuid.UUID, req *models.SearchRequest) (*models.SearchResponse, error) {
+	s.logger.Info("Searching items with locations for organization: ", orgID, " query: ", req.Query)
+	
+	results, err := s.operationsRepo.Search(ctx, orgID, req.Query, req.Category, req.Address)
+	if err != nil {
+		s.logger.Error("Failed to search items with locations: ", err)
+		return nil, err
+	}
+	
+	response := &models.SearchResponse{
+		Items:      results,
+		TotalCount: len(results),
+	}
+	
+	return response, nil
+}
diff --git a/core-service/main b/core-service/main
new file mode 100755
index 0000000..c5a8671
Binary files /dev/null and b/core-service/main differ