Sourav Ghosh
Java Developer
Bangalore
Summary
Backend Java Developer with 3+ years of experience designing high-performance , scalable backend systems using Java , Spring Boot , and Microservices . Skilled in building secure , transaction-driven architectures with Spring Data JPA , JWT authentication , and robust exception handling . Experienced in deploying distributed , cloud-native services optimized for reliability , concurrency , and low latency . Driven by a passion for creating impactful , production-ready backend solutions with clean architecture and precise execution .
Overview
4
4
years of professional experience
Work History
Research Analyst-IT
Globsyn I.T Services (p) Ltd
10.2019 - 02.2022
- Engineered backend solutions utilizing Spring Boot, Hibernate/JPA, and REST APIs, enhancing scalability by 30%
- Streamlined API latency via improved SQL query optimization, effective connection pooling, and strategic caching.
- Rectified 250+ critical defects, bolstering system stability and client satisfaction.
- Integrated efforts with frontend teams (React, HTML5, CSS3) to achieve seamless full-stack delivery.
Java Developer (Intern)
B GRYT STA LLP
10.2018 - 05.2019
- Enhanced backend development and code optimization, minimizing product delivery cycle by 15%
- Executed R&D on emerging technologies to enhance future product features.
Summer Training Program
Globsyn Finishing School
07.2018 - 08.2018
- Delivered numerous projects leveraging Web Application Development based on J2EE and Struts2
Education
B.Tech - Computer Science & Engineering
Adamas Institute of Technology
Kolkata07.2019
Skills
- Core Java, J2EE, JSP, Servlet, JDBC
- Spring Boot, Spring MVC, Spring Security
- Hibernate/JPA, REST API, and microservices
- Java collections and multithreading
- MySQL, AWS, CI/CD, Kafka, Reactjs
- Data structures and algorithms, system design
- Git, Docker, Jenkins, Maven, and Kubernetes
- Apache Tomcat, XML, JShell
Recent Backend Projects (2022–2025)
Payment Gateway Simulation (Spring Boot, Kafka, Redis, AWS)
- Architected a mock payment ecosystem capable of handling 100K+ concurrent requests/min with less than 200ms latency.
- Designed event-driven architecture with Kafka for transaction lifecycle events; implemented Redis caching to cut DB load by 40% .
- Integrated JWT authentication and role-based security for payment APIs.
- Fully deployed on AWS EC2 with RDS backend.
User Management & Auth API (Spring Boot, MySQL, AWS)
- Engineered role-based access control with Spring Security and JWT for secure authentication/authorization.
- Reduced average API response time from 120ms → 50ms via query optimization & caching.
- Deployed on AWS EC2 with CI/CD pipeline via Jenkins.
Low-Latency Notification Service (Java, Kafka, AWS S3)
- Built a distributed notification delivery system processing 10K+ messages/min .
- Used Kafka for async event distribution; stored logs in AWS S3 for analytics.
- Achieved 99.99% delivery reliability through retry and dead-letter queue handling.
Freelance & Independent Backend Development (Mar 2022 – Present)
Dedicated this period to advanced backend upskilling , fintech-domain projects , and freelance backend development for vendors .
- Delivered backend modules for vendor management and invoicing systems as a freelancer.
- Built and deployed cloud-native microservices with Spring Boot, Kafka, Redis, and AWS.
- Created payment simulation systems, secure APIs, and notification services for small business clients.
- Solved 200+ DSA problems (LeetCode, HackerRank) focusing on backend problem-solving & system design.
- Currently pursuing AWS Certified Developer – Associate and Spring Professional Certification .
Achievements
- Qualified 2nd and 3rd Indian Engineering Olympiad (IEO) , 2017 and 2018
- Certificate of participation for the Loophole Ethical Hacking Workshop conducted by Karin Digital Securities (P) Ltd., 2016
- Achievements in sports at the school level or various places in West Bengal, India
Timeline
Research Analyst-IT
Globsyn I.T Services (p) Ltd
10.2019 - 02.2022
Java Developer (Intern)
B GRYT STA LLP
10.2018 - 05.2019
Summer Training Program
Globsyn Finishing School
07.2018 - 08.2018
B.Tech - Computer Science & Engineering
Adamas Institute of Technology