📌 Key Features & Technologies: ⚙️ Tech Stack : Java 17+ Spring Boot Spring Security with JWT Spring Data JPA RESTful APIs MapStruct for DTO ↔ Entity mapping Exception Handling: Global handler for custom exceptions Maven for build management Role-based Access Control (RBAC) using custom Role enum Entity Design: Polymorphic UserDetails (User, Admin) DTO Architecture: Entry, Exit, Update DTOs for clean separation Scheduling: Price updates with PriceSchedulerService Secure Authentication: JWT token filter, login/logout routes

🧠 Domain Design : Entities: User, Admin, Product, Cart, Order, CartItem, OrderItem, Price Enum-based business logic: Status, Roles, OrderStatus, Action Types Repositories: Clean, segregated JPA Repositories Controllers: Auth, Product, Cart, Order, User controllers Service Layer: Interfaces and Implementations separated (e.g., UserService + UserServiceImpl) Security Layer: JwtAuthFilter, JwtUtil, CustomUserDetailsService Secure role validation and stateless session handling

Detailed Description :

• Developed a secure and scalable Order Management System backend using Java 17 and Spring Boot with JWT-based authentication and RBAC.
• Implemented clean layered architecture with separation of DTOs (entry, exit, update), entities, services, repositories, and exception handling.
• Designed and integrated REST APIs for cart, product, user, and order management, supporting full CRUD operations with role-based authorization.
• Utilized Spring Security and JWT to secure APIs, building a stateless authentication mechanism with custom filters and token utilities.
• Created custom global exception handling with structured error responses, enhancing debuggability and maintainability.
• Built scheduled services using Spring's @Scheduled to update product pricing dynamically.
• Employed MapStruct for efficient, boilerplate-free mapping between DTOs and domain entities.
• Followed best practices with Maven, modular packaging, and meaningful naming conventions for extensibility and testability.