RAJARAJAN R B

About

Java developer with hands-on experience building backend applications using Java, Spring Boot, REST APIs, JPA, Hibernate, and MySQL. Currently expanding into full-stack development while strengthening problem-solving skills through LeetCode practice.

Education

• Bachelor of Engineering
  Hindusthan College of Engineering and Technology
  Mechanical Engineering · Nov 2022 – May 2026

Skills

• SQL <3 months
• CSS <3 months
• HTML <3 months
• Java <3 months
• JavaScript <3 months
• React <3 months
• Spring MVC <3 months
• JWT <3 months
• Spring Security <3 months
• API Integration Understanding <3 months
• Hibernate <3 months
• JPA <3 months
• Exception Handling <3 months
• Data Structures and Algorithms <3 months
• Oop <3 months
• Advanced DBMS <3 months

Tools / apps / platforms

• Apache Maven <3 months
• Claude <3 months
• Docker <3 months
• Git <3 months
• GitHub <3 months
• GitHub Copilot <3 months
• Google Gemini <3 months
• Kubernetes <3 months
• MySQL <3 months
• OpenAI ChatGPT <3 months
• PostgreSQL <3 months
• Postman <3 months
• VS Code <3 months

Projects

• Bus Reservation System
  Java

  Developed ticket booking and cancellation functionality with seat availability and fare calculation, plus validation and error handling.

• Banking System Application
  Java, Object-Oriented Programming

  Developed a modular banking management system with account creation, deposits, withdrawals, balance enquiry, interest calculation, input validation, and exception handling.

• E-Commerce Backend Application
  Java, Spring Boot, MySQL, JPA, Hibernate, JWT

  Developed REST APIs for user authentication, product management, cart management, and order processing. Implemented JWT-based authentication and authorization, role-based access control, database integration, pagination, request validation, global exception handling, cart management, order tracking, and layered architecture using Controller, Service, and Repository components.