System Design : Designed the system architecture following the MVC pattern and defined data models.API Design and Implementation : Create RESTful APIs for rooms, booking, review and roomType management using Spring MVC architecture.Data Modeling: Designed entity classes using Hibernate JPA annotations and utilized Lombok for code reduction and improved code readability.DTO Mapping : Created DTO classes for data transfer and implemented mapping between DTOs and entity classes using ModelMapper.Developed and maintained repository layer, implementing data access operations and queries using Spring Data JPA.Service Layer: Implemented the service layer for handling business logic.API Testing: Performed API testing using Postman and JUnit.Database Management: Utilized MySQL as the database management system for storing data and performed CRUD operations using JPA.Spring Security: Implemented authentication and authorization features using Spring Security to secure the RESTful APIs. Configured JWT (JSON Web Token) authentication for user sessions and role-based access control.JWT Token Generation: Implemented JWT token generation and verification mechanisms to authenticate and authorize API requests. Generated and issued JWT tokens upon successful login or authentication.