Devi Bala . V Bala . V

Backend Developer

Chennai, India 3+ yrs exp 92 · Outstanding

About

Backend Developer with nearly 2 years of experience designing, developing, and maintaining RESTful web services and microservices using Java, Spring Boot, Spring Data JPA and Spring Security within banking integrations. Adept at writing clean, efficient, and maintainable code, resolving production defects and improving application performance. Well-versed in Agile/Scrum methodologies and collaborative code reviews.

Skills & Expertise (46)

Spring Boot Advanced

8.2/10

Years Exp

Java Advanced

7.8/10

Years Exp

Docker Advanced

7.8/10

Years Exp

Microservices Advanced

7.6/10

Years Exp

RESTful APIs Advanced

7.4/10

Years Exp

Kubernetes Advanced

7.4/10

Years Exp

Jenkins Advanced

7.0/10

Years Exp

Git Advanced

7.0/10

Years Exp

MySql Advanced

7.0/10

Years Exp

SQL Advanced

6.8/10

Years Exp

Azure AI Mockito Postman Swagger Openapi AWS (S3 Bitbucket Gen AI Eclipse SonarQube IntelliJ IDEA VS Code Jira ReactJS Typescript Tailwind CSS Figma Spring Security Collections OOP Java8 Java17 Streams Exception Handling Multi-threading Bean Validation Spring JUnit Spring Data JPA Hibernate ORM JDBC Layered Architecture Apache Kafka GitHub Maven Gradle

Work Experience

Assistant System Engineer – Software Developer

Tata Consultancy Services

Nov 2024 - Jul 2026

Engineered and maintained 10+ Java/Spring Boot microservices for banking rewards and transaction workflows, consistently delivering a zero-defect track record across all production releases. Recognized as a top performer within a 70+ member banking account team for consistent, high-quality code delivery, reflected in Star of the Month / Technical Excellence award recognitions. Provided technical guidance and troubleshooting support to team members, helping resolve blockers and backend defects to keep sprint deliverables on track. Spearheaded a COBOL-to-Java migration, validating 10,000+ lines of legacy business logic per sprint with 100% functional equivalence and zero regressions. Designed and implemented core business logic in Spring Boot, managing data persistence through Spring Data JPA and Hibernate ORM for high-volume transactional data. Strengthened REST API security using Spring Security, implementing authentication and authorization mechanisms to protect sensitive financial data. Diagnosed and resolved backend production defects through systematic debugging and root-cause analysis, improving overall application stability. Managed source control and collaborative development using GitHub and Bitbucket, including branch strategy and peer code reviews. Streamlined build and dependency management with Maven and Gradle, integrating Jenkins into the CI/CD pipeline for faster, reliable deployments. Containerized applications using Docker and gained hands-on experience with Kubernetes orchestration for scalable deployment. Processed and migrated enterprise datasets across DB2, IMS, VSAM, and QSAM systems, using AWS S3 for secure migration artifact management. Collaborated in Agile/Scrum ceremonies — sprint planning, stand-ups, backlog grooming, retrospectives — contributing to on-time sprint delivery.

Front End Developer – Intern

Missile Ingeniator

Jan 2022 - Jan 2024

Developed responsive and user-friendly web pages using ReactJS, TypeScript and Tailwind CSS. Created reusable and responsive UI components using ReactJS and Tailwind CSS. Designed and structured web page layouts and user interfaces using Figma before implementation. Collaborated on converting Figma designs into responsive web interfaces with consistent UI structure and styling. Worked on improving the usability, responsiveness, and visual consistency of web pages across different screen sizes.