Sanjay Kumaran

I build backend and frontend features using Java and Spring Boot, with React-based UIs and secure REST API integrations. At Tata Consultancy Services (TCS), I designed 15+ scalable RESTful APIs for state bank of India projects and helped connect core banking systems.

I’ve worked on microservices for account management, transactions, authentication, and financial workflows, including NEFT/RTGS transaction support and high-volume operations. I also implemented Spring Batch jobs for transaction processing, reconciliation, and settlement with fault-tolerant mechanisms, plus scheduled workflows for interest calculation and reporting.

On the delivery side, I contributed to CI/CD pipelines using Jenkins and Docker, deployed services on AWS EC2, and integrated S3 for secure data handling. I improved test automation coverage using JUnit and Mockito and monitored performance through logs and debugging to reduce downtime.

For the frontend, I developed responsive React.js applications with performance-focused updates like lazy loading and memoization, and tightened stability by integrating REST APIs with robust error handling. I collaborate in Agile ceremonies and partner with QA, product, and UI/UX teams to keep API integration smooth.