Headline

Immediate Joiner | Java Backend Engineer | Spring Boot · Microservices · JWT · PostgreSQL | 3+ Yrs @ Cognizant

About

Java Backend Engineer with 3+ years at Cognizant, specializing in building scalable microservices and secure REST API architectures using the Spring ecosystem. → Design and implement production-grade distributed backend systems using Spring Boot 3 & Spring Cloud → Build stateless authentication layers with JWT, Spring Security & BCrypt → Architect inter-service communication with OpenFeign, API Gateway & Netflix Eureka → Optimize database performance using Hibernate/JPA — N+1 resolution, EntityGraph, batch fetching & query tuning → Write clean, testable code following SOLID principles with comprehensive exception handling Experience: • Developed and maintained enterprise-grade backend services using Java 17 and Spring Boot 3, serving production systems handling 10K+ daily API requests with 99.9% uptime. • Engineered stateless JWT-based authentication and role-based authorization using Spring Security, securing 20+ REST API endpoints and eliminating session-based vulnerabilities across microservices. • Optimized Hibernate/JPA query performance by implementing @EntityGraph, JOIN FETCH, and batch fetching strategies — resolving N+1 query patterns and reducing database round-trips by 60%. • Designed microservices architecture using Spring Cloud Gateway for centralized routing, Netflix Eureka for service discovery, and OpenFeign for declarative inter-service communication with client-side load balancing. • Architected PostgreSQL database schemas with Hibernate ORM, wrote optimized JPQL queries, and implemented global exception handling (@ControllerAdvice) for standardized API error responses with proper HTTP status codes. • Collaborated in Agile/Scrum sprints with cross-functional teams, conducted peer code reviews, and maintained CI/CD pipelines using Git, Maven, and Jenkins.

Location

Greater Kolkata Area

Work experience

Associate at Cognizant, Oct 2025 - Present · 9 mos, Kolkata

Programming Analyst at Cognizant, Feb 2023 - Oct 2025 · 2 yrs 9 mos, Kolkata, West Bengal, India

Intern at Cognizant, Feb 2022 - Mar 2023 · 1 yr 2 mos

Education

Bachelor of Technology - BTech, Mechanical Engineering, Heritage Institute of Technology