diff --git a/main.go b/main.go
index 8ecc3aa..f508396 100644
--- a/main.go
+++ b/main.go
@@ -1,7 +1,12 @@
 package main
 
 import (
-	"backend/src"
+	"backend/src/handlers"
+	"backend/src/middleware"
+	"backend/src/models"
+	"backend/src/repo"
+	"backend/src/services"
+	"backend/src/utils"
 	"crypto/rand"
 	"crypto/rsa"
 
@@ -30,27 +35,31 @@ func main() {
 		panic(err)
 	}
 
-	jwtUtil := src.NewJwtUtil(key)
-	passwordUtil := src.NewPasswordUtil()
-	db := src.NewDB(sqlDb)
-	userService := src.NewUserService(src.UserServiceDeps{
-		Jwt:      jwtUtil,
-		Password: passwordUtil,
-		Db:       db,
-		Cache:    src.NewCacheInmem[string, src.UserDTO](60 * 60),
-	})
+	jwtUtil := utils.NewJwtUtil(key)
+	passwordUtil := utils.NewPasswordUtil()
+	userRepo := repo.NewUserRepo(sqlDb)
+	userCache := repo.NewCacheInmem[string, models.UserDTO](60 * 60)
+
+	userService := services.NewUserService(
+		services.UserServiceDeps{
+			Jwt:       jwtUtil,
+			Password:  passwordUtil,
+			UserRepo:  userRepo,
+			UserCache: userCache,
+		},
+	)
 
 	r := gin.New()
 	r.Use(gin.Logger())
 	r.Use(gin.Recovery())
 
 	userGroup := r.Group("/user")
-	userGroup.POST("/create", src.NewUserCreateHandler(userService))
-	userGroup.POST("/login", src.NewUserLoginHandler(userService))
+	userGroup.POST("/create", handlers.NewUserCreateHandler(userService))
+	userGroup.POST("/login", handlers.NewUserLoginHandler(userService))
 
 	dummyGroup := r.Group("/dummy")
-	dummyGroup.Use(src.NewAuthMiddleware(userService))
-	dummyGroup.GET("/", src.NewDummyHandler())
+	dummyGroup.Use(middleware.NewAuthMiddleware(userService))
+	dummyGroup.GET("/", handlers.NewDummyHandler())
 
 	r.Run(":8080")
 }
diff --git a/src/db.go b/src/db.go
deleted file mode 100644
index 79af35a..0000000
--- a/src/db.go
+++ /dev/null
@@ -1,70 +0,0 @@
-package src
-
-import (
-	"context"
-	"database/sql"
-	"errors"
-)
-
-type DB interface {
-	CreateUser(ctx context.Context, dto UserDTO) (*UserDTO, error)
-	GetUserById(ctx context.Context, id string) (*UserDTO, error)
-	GetUserByLogin(ctx context.Context, login string) (*UserDTO, error)
-}
-
-func NewDB(db *sql.DB) DB {
-	return &dbImpl{db}
-}
-
-type dbImpl struct {
-	db *sql.DB
-}
-
-func (d *dbImpl) CreateUser(ctx context.Context, dto UserDTO) (*UserDTO, error) {
-	query := `insert into users (login, secret, name) values ($1, $2, $3) returning id;`
-	row := d.db.QueryRowContext(ctx, query, dto.Login, dto.Secret, dto.Name)
-
-	id := ""
-	if err := row.Scan(&id); err != nil {
-		return nil, err
-	}
-
-	return &UserDTO{
-		Id:     id,
-		Login:  dto.Login,
-		Secret: dto.Secret,
-		Name:   dto.Name,
-	}, nil
-}
-
-func (d *dbImpl) GetUserById(ctx context.Context, id string) (*UserDTO, error) {
-	query := `select id, login, secret, name from users where id = $1;`
-	row := d.db.QueryRowContext(ctx, query, id)
-
-	dto := &UserDTO{}
-	err := row.Scan(&dto.Id, &dto.Login, &dto.Secret, &dto.Name)
-	if err == nil {
-		return dto, nil
-	}
-	if errors.Is(err, sql.ErrNoRows) {
-		return nil, nil
-	}
-
-	return nil, err
-}
-
-func (d *dbImpl) GetUserByLogin(ctx context.Context, login string) (*UserDTO, error) {
-	query := `select id, login, secret, name from users where login = $1;`
-	row := d.db.QueryRowContext(ctx, query, login)
-
-	dto := &UserDTO{}
-	err := row.Scan(&dto.Id, &dto.Login, &dto.Secret, &dto.Name)
-	if err == nil {
-		return dto, nil
-	}
-	if errors.Is(err, sql.ErrNoRows) {
-		return nil, nil
-	}
-
-	return nil, err
-}
diff --git a/src/dummy_handler.go b/src/handlers/dummy_handler.go
similarity index 88%
rename from src/dummy_handler.go
rename to src/handlers/dummy_handler.go
index 9ad39f0..7dc5af3 100644
--- a/src/dummy_handler.go
+++ b/src/handlers/dummy_handler.go
@@ -1,4 +1,4 @@
-package src
+package handlers
 
 import "github.com/gin-gonic/gin"
 
diff --git a/src/user_create_handler.go b/src/handlers/user_create_handler.go
similarity index 77%
rename from src/user_create_handler.go
rename to src/handlers/user_create_handler.go
index 305cf39..3ab2269 100644
--- a/src/user_create_handler.go
+++ b/src/handlers/user_create_handler.go
@@ -1,6 +1,7 @@
-package src
+package handlers
 
 import (
+	"backend/src/services"
 	"encoding/json"
 
 	"github.com/gin-gonic/gin"
@@ -18,7 +19,7 @@ type createUserOutput struct {
 	Name  string `json:"name"`
 }
 
-func NewUserCreateHandler(userService UserService) gin.HandlerFunc {
+func NewUserCreateHandler(userService services.UserService) gin.HandlerFunc {
 	return func(ctx *gin.Context) {
 		params := createUserInput{}
 		if err := ctx.ShouldBindJSON(&params); err != nil {
@@ -26,12 +27,12 @@ func NewUserCreateHandler(userService UserService) gin.HandlerFunc {
 			return
 		}
 
-		dto, err := userService.CreateUser(ctx, UserCreateParams{
+		dto, err := userService.CreateUser(ctx, services.UserCreateParams{
 			Login:    params.Login,
 			Password: params.Password,
 			Name:     params.Name,
 		})
-		if err == ErrUserExists || err == ErrUserBadPassword {
+		if err == services.ErrUserExists || err == services.ErrUserBadPassword {
 			ctx.Data(400, "plain/text", []byte(err.Error()))
 			return
 		}
diff --git a/src/user_login_handler.go b/src/handlers/user_login_handler.go
similarity index 78%
rename from src/user_login_handler.go
rename to src/handlers/user_login_handler.go
index 819d990..2a273e4 100644
--- a/src/user_login_handler.go
+++ b/src/handlers/user_login_handler.go
@@ -1,6 +1,7 @@
-package src
+package handlers
 
 import (
+	"backend/src/services"
 	"encoding/json"
 
 	"github.com/gin-gonic/gin"
@@ -15,7 +16,7 @@ type loginUserOutput struct {
 	Token string `json:"token"`
 }
 
-func NewUserLoginHandler(userService UserService) gin.HandlerFunc {
+func NewUserLoginHandler(userService services.UserService) gin.HandlerFunc {
 	return func(ctx *gin.Context) {
 		params := loginUserInput{}
 		if err := ctx.ShouldBindJSON(&params); err != nil {
@@ -24,7 +25,7 @@ func NewUserLoginHandler(userService UserService) gin.HandlerFunc {
 		}
 
 		token, err := userService.AuthenticateUser(ctx, params.Login, params.Password)
-		if err == ErrUserNotExists || err == ErrUserWrongPassword {
+		if err == services.ErrUserNotExists || err == services.ErrUserWrongPassword {
 			ctx.AbortWithError(400, err)
 			return
 		}
diff --git a/src/auth_middleware.go b/src/middleware/auth.go
similarity index 64%
rename from src/auth_middleware.go
rename to src/middleware/auth.go
index a08f530..9392816 100644
--- a/src/auth_middleware.go
+++ b/src/middleware/auth.go
@@ -1,12 +1,13 @@
-package src
+package middleware
 
 import (
+	"backend/src/services"
 	"fmt"
 
 	"github.com/gin-gonic/gin"
 )
 
-func NewAuthMiddleware(userService UserService) gin.HandlerFunc {
+func NewAuthMiddleware(userService services.UserService) gin.HandlerFunc {
 	return func(ctx *gin.Context) {
 		token := ctx.GetHeader("X-Auth")
 		if token == "" {
@@ -15,7 +16,7 @@ func NewAuthMiddleware(userService UserService) gin.HandlerFunc {
 		}
 
 		user, err := userService.ValidateToken(ctx, token)
-		if err == ErrUserWrongToken || err == ErrUserNotExists {
+		if err == services.ErrUserWrongToken || err == services.ErrUserNotExists {
 			ctx.AbortWithError(403, err)
 			return
 		}
diff --git a/src/model.go b/src/model.go
deleted file mode 100644
index b5c1e9c..0000000
--- a/src/model.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package src
-
-type UserDTO struct {
-	Id     string
-	Login  string
-	Secret string
-	Name   string
-}
-
-type UserDAO struct {
-	Id     string `json:"id"`
-	Login  string `json:"login"`
-	Secret string `json:"secret"`
-	Name   string `json:"name"`
-}
diff --git a/src/models/user.go b/src/models/user.go
new file mode 100644
index 0000000..1deb356
--- /dev/null
+++ b/src/models/user.go
@@ -0,0 +1,8 @@
+package models
+
+type UserDTO struct {
+	Id     string
+	Login  string
+	Secret string
+	Name   string
+}
diff --git a/src/cache_inmem.go b/src/repo/cache_inmem.go
similarity index 98%
rename from src/cache_inmem.go
rename to src/repo/cache_inmem.go
index 57ff597..7b27175 100644
--- a/src/cache_inmem.go
+++ b/src/repo/cache_inmem.go
@@ -1,4 +1,4 @@
-package src
+package repo
 
 import (
 	"sync"
diff --git a/src/repo/user_repo.go b/src/repo/user_repo.go
new file mode 100644
index 0000000..a7d4e61
--- /dev/null
+++ b/src/repo/user_repo.go
@@ -0,0 +1,78 @@
+package repo
+
+import (
+	"backend/src/models"
+	"context"
+	"database/sql"
+	"errors"
+)
+
+// type userDAO struct {
+// 	Id     string `json:"id"`
+// 	Login  string `json:"login"`
+// 	Secret string `json:"secret"`
+// 	Name   string `json:"name"`
+// }
+
+type UserRepo interface {
+	CreateUser(ctx context.Context, dto models.UserDTO) (*models.UserDTO, error)
+	GetUserById(ctx context.Context, id string) (*models.UserDTO, error)
+	GetUserByLogin(ctx context.Context, login string) (*models.UserDTO, error)
+}
+
+func NewUserRepo(db *sql.DB) UserRepo {
+	return &userRepo{db}
+}
+
+type userRepo struct {
+	db *sql.DB
+}
+
+func (u *userRepo) CreateUser(ctx context.Context, dto models.UserDTO) (*models.UserDTO, error) {
+	query := `insert into users (login, secret, name) values ($1, $2, $3) returning id;`
+	row := u.db.QueryRowContext(ctx, query, dto.Login, dto.Secret, dto.Name)
+
+	id := ""
+	if err := row.Scan(&id); err != nil {
+		return nil, err
+	}
+
+	return &models.UserDTO{
+		Id:     id,
+		Login:  dto.Login,
+		Secret: dto.Secret,
+		Name:   dto.Name,
+	}, nil
+}
+
+func (u *userRepo) GetUserById(ctx context.Context, id string) (*models.UserDTO, error) {
+	query := `select id, login, secret, name from users where id = $1;`
+	row := u.db.QueryRowContext(ctx, query, id)
+
+	dto := &models.UserDTO{}
+	err := row.Scan(&dto.Id, &dto.Login, &dto.Secret, &dto.Name)
+	if err == nil {
+		return dto, nil
+	}
+	if errors.Is(err, sql.ErrNoRows) {
+		return nil, nil
+	}
+
+	return nil, err
+}
+
+func (u *userRepo) GetUserByLogin(ctx context.Context, login string) (*models.UserDTO, error) {
+	query := `select id, login, secret, name from users where login = $1;`
+	row := u.db.QueryRowContext(ctx, query, login)
+
+	dto := &models.UserDTO{}
+	err := row.Scan(&dto.Id, &dto.Login, &dto.Secret, &dto.Name)
+	if err == nil {
+		return dto, nil
+	}
+	if errors.Is(err, sql.ErrNoRows) {
+		return nil, nil
+	}
+
+	return nil, err
+}
diff --git a/src/service.go b/src/services/user_service.go
similarity index 67%
rename from src/service.go
rename to src/services/user_service.go
index 51ce773..8c8a6ce 100644
--- a/src/service.go
+++ b/src/services/user_service.go
@@ -1,6 +1,9 @@
-package src
+package services
 
 import (
+	"backend/src/models"
+	"backend/src/repo"
+	"backend/src/utils"
 	"context"
 	"fmt"
 )
@@ -15,9 +18,9 @@ var (
 )
 
 type UserService interface {
-	CreateUser(ctx context.Context, params UserCreateParams) (*UserDTO, error)
+	CreateUser(ctx context.Context, params UserCreateParams) (*models.UserDTO, error)
 	AuthenticateUser(ctx context.Context, login, password string) (string, error)
-	ValidateToken(ctx context.Context, tokenStr string) (*UserDTO, error)
+	ValidateToken(ctx context.Context, tokenStr string) (*models.UserDTO, error)
 }
 
 func NewUserService(deps UserServiceDeps) UserService {
@@ -25,10 +28,10 @@ func NewUserService(deps UserServiceDeps) UserService {
 }
 
 type UserServiceDeps struct {
-	Db       DB
-	Jwt      JwtUtil
-	Password PasswordUtil
-	Cache    Cache[string, UserDTO]
+	Jwt       utils.JwtUtil
+	Password  utils.PasswordUtil
+	UserRepo  repo.UserRepo
+	UserCache repo.Cache[string, models.UserDTO]
 }
 
 type userService struct {
@@ -41,8 +44,8 @@ type UserCreateParams struct {
 	Name     string
 }
 
-func (u *userService) CreateUser(ctx context.Context, params UserCreateParams) (*UserDTO, error) {
-	exisitngUser, err := u.deps.Db.GetUserByLogin(ctx, params.Login)
+func (u *userService) CreateUser(ctx context.Context, params UserCreateParams) (*models.UserDTO, error) {
+	exisitngUser, err := u.deps.UserRepo.GetUserByLogin(ctx, params.Login)
 	if err != nil {
 		return nil, err
 	}
@@ -59,24 +62,24 @@ func (u *userService) CreateUser(ctx context.Context, params UserCreateParams) (
 		return nil, err
 	}
 
-	user := UserDTO{
+	user := models.UserDTO{
 		Login:  params.Login,
 		Secret: string(secret),
 		Name:   params.Name,
 	}
 
-	result, err := u.deps.Db.CreateUser(ctx, user)
+	result, err := u.deps.UserRepo.CreateUser(ctx, user)
 	if err != nil {
 		return nil, err
 	}
 
-	u.deps.Cache.Set(result.Id, *result, -1)
+	u.deps.UserCache.Set(result.Id, *result, -1)
 
 	return result, nil
 }
 
 func (u *userService) AuthenticateUser(ctx context.Context, login, password string) (string, error) {
-	user, err := u.deps.Db.GetUserByLogin(ctx, login)
+	user, err := u.deps.UserRepo.GetUserByLogin(ctx, login)
 	if err != nil {
 		return "", err
 	}
@@ -88,22 +91,23 @@ func (u *userService) AuthenticateUser(ctx context.Context, login, password stri
 		return "", ErrUserWrongPassword
 	}
 
-	jwt, err := u.deps.Jwt.Create(*user)
+	payload := utils.JwtPayload{UserId: user.Id}
+	jwt, err := u.deps.Jwt.Create(payload)
 	if err != nil {
 		return "", err
 	}
 
-	u.deps.Cache.Set(user.Id, *user, -1)
+	u.deps.UserCache.Set(user.Id, *user, -1)
 
 	return jwt, nil
 }
 
-func (u *userService) getUserById(ctx context.Context, userId string) (*UserDTO, error) {
-	if user, ok := u.deps.Cache.Get(userId); ok {
+func (u *userService) getUserById(ctx context.Context, userId string) (*models.UserDTO, error) {
+	if user, ok := u.deps.UserCache.Get(userId); ok {
 		return &user, nil
 	}
 
-	user, err := u.deps.Db.GetUserById(ctx, userId)
+	user, err := u.deps.UserRepo.GetUserById(ctx, userId)
 	if err != nil {
 		return nil, err
 	}
@@ -111,12 +115,12 @@ func (u *userService) getUserById(ctx context.Context, userId string) (*UserDTO,
 		return nil, ErrUserNotExists
 	}
 
-	u.deps.Cache.Set(user.Id, *user, -1)
+	u.deps.UserCache.Set(user.Id, *user, -1)
 
 	return user, nil
 }
 
-func (u *userService) ValidateToken(ctx context.Context, tokenStr string) (*UserDTO, error) {
+func (u *userService) ValidateToken(ctx context.Context, tokenStr string) (*models.UserDTO, error) {
 	payload, err := u.deps.Jwt.Parse(tokenStr)
 	if err != nil {
 		return nil, ErrUserWrongToken
diff --git a/src/jwt.go b/src/utils/jwt.go
similarity index 61%
rename from src/jwt.go
rename to src/utils/jwt.go
index 54aff46..1cafcbb 100644
--- a/src/jwt.go
+++ b/src/utils/jwt.go
@@ -1,4 +1,4 @@
-package src
+package utils
 
 import (
 	"crypto/rsa"
@@ -8,12 +8,16 @@ import (
 )
 
 type JwtPayload struct {
-	jwt.RegisteredClaims
 	UserId string `json:"userId"`
 }
 
+type jwtClaims struct {
+	jwt.RegisteredClaims
+	JwtPayload
+}
+
 type JwtUtil interface {
-	Create(user UserDTO) (string, error)
+	Create(payload JwtPayload) (string, error)
 	Parse(tokenStr string) (JwtPayload, error)
 }
 
@@ -27,9 +31,9 @@ type jwtUtil struct {
 	privateKey *rsa.PrivateKey
 }
 
-func (j *jwtUtil) Create(user UserDTO) (string, error) {
-	payload := &JwtPayload{UserId: user.Id}
-	token := jwt.NewWithClaims(jwt.SigningMethodRS256, payload)
+func (j *jwtUtil) Create(payload JwtPayload) (string, error) {
+	claims := &jwtClaims{JwtPayload: payload}
+	token := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
 	tokenStr, err := token.SignedString(j.privateKey)
 	if err != nil {
 		return "", err
@@ -38,15 +42,15 @@ func (j *jwtUtil) Create(user UserDTO) (string, error) {
 }
 
 func (j *jwtUtil) Parse(tokenStr string) (JwtPayload, error) {
-	token, err := jwt.ParseWithClaims(tokenStr, &JwtPayload{}, func(t *jwt.Token) (interface{}, error) {
+	token, err := jwt.ParseWithClaims(tokenStr, &jwtClaims{}, func(t *jwt.Token) (interface{}, error) {
 		return &j.privateKey.PublicKey, nil
 	})
 	if err != nil {
 		return JwtPayload{}, err
 	}
 
-	if payload, ok := token.Claims.(*JwtPayload); ok {
-		return *payload, nil
+	if claims, ok := token.Claims.(*jwtClaims); ok {
+		return claims.JwtPayload, nil
 	}
 
 	return JwtPayload{}, fmt.Errorf("cant get payload")
diff --git a/src/password_util.go b/src/utils/password.go
similarity index 98%
rename from src/password_util.go
rename to src/utils/password.go
index 76ccf7f..930a38c 100644
--- a/src/password_util.go
+++ b/src/utils/password.go
@@ -1,4 +1,4 @@
-package src
+package utils
 
 import (
 	"fmt"