Summary
Overview
Work History
Education
Skills
Recent Backend Projects (2022–2025)
Freelance & Independent Backend Development (Mar 2022 – Present)
Achievements
Timeline
Generic

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
Kolkata
07.2019

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

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Sourav GhoshJava Developer