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Soumyajit Nandi

backend engineer · java · spring boot

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Soumyajit Nandi

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Who I Am

I'm a Backend Engineer passionate about building systems that scale and APIs that are a pleasure to integrate. My primary stack is Java & Spring Boot, and I specialise in secure REST APIs, JWT authentication flows, and clean data modelling with MySQL, PostgreSQL, and MongoDB.


Before going deep on backend engineering, I worked at Accenture as a Packaged App Development Associate, where I maintained production codebases, handled merges and version updates, and continuously improved application delivery quality. That hands-on maintenance mindset shapes how I approach code: build it to run, not just to ship.


I hold a BCA degree (CGPA 9.1) from Dinabandhu Andrews Institute of Technology & Management and I'm always looking for the next interesting engineering challenge.

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BCA CGPA
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Projects Shipped
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Tech Stacks
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Core Skills

Where I've Worked

Packaged App Development Associate
Accenture · Kolkata, India
Accenture
  • Maintained and updated production codebases, ensuring clean, reliable, and well-documented code across releases.
  • Managed Git merges and branch integrations, resolving conflicts and keeping release pipelines stable.
  • Handled version updates and release management, tracking changes across environments to minimise regressions.
  • Enhanced and maintained the team's internal portfolio, continuously improving structure, content, and presentation.
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Independent Backend Engineer
Self-directed · Open Source
2024 – Present
  • Designed and shipped three production-grade backend systems using Spring Boot, JWT, and both relational and NoSQL databases.
  • Built a custom API Gateway with Token Bucket rate limiting, IP whitelisting, and centralised request logging.
  • Architected StockFlow, a full inventory management backend with complex JPA relationships and optimised CRUD operations.
  • Developed TrueReach, a scalable email campaign backend featuring server-side filtering, dynamic pagination, and analytics.
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Technical Arsenal

Languages
Java SQL C JavaScript
Java90%
SQL82%
Backend
Spring Boot Spring Security Spring AI Hibernate JPA REST APIs Core Java
Spring Boot88%
REST APIs85%
Databases
MySQL PostgreSQL MongoDB
MySQL85%
MongoDB78%
Architecture
API Gateway JWT Auth System Design Rate Limiting
System Design78%
Tools & Testing
Git Maven Postman Swagger JUnit5 Mockito
Git / Maven85%
DevOps & Cloud
AWS DevOps CI/CD Docker System Monitoring
AWS75%
DevOps75%
Frontend
JavaScript HTML5 CSS3 Responsive UI
Frontend78%

What I've Built

API Gateway with Rate Limiting

A secure API Gateway that manages and routes client requests with JWT authentication, Token Bucket rate limiting, IP whitelisting, and centralised request logging for active access control.

Spring BootMongoDBJWTREST APIs
StockFlow

Scalable inventory management backend handling products, stock updates, supplier management, and automated reporting. Clean REST APIs with optimised CRUD and one-to-many/many-to-many JPA relationships.

Spring BootMySQLJPA/HibernateREST APIs
StayEase

A modern accommodation booking platform that helps users discover and book stays seamlessly. Designed for a smooth reservation experience with a curated listing flow, responsive UI, and clear property discovery.

ReactJavaScriptTailwindResponsive UI
TrueReach

Performant email campaign backend managing subscriber data securely at scale. Features server-side filtering, dynamic pagination, JWT auth, and analytics tracking for large dataset processing and campaign performance measurement.

Spring BootMongoDBJWTREST APIs
Certification

Certificate of Completion

This is to certify that
Soumyajit Nandi
has successfully completed all the modules of Professional Certificate In AI
Software Development – IITM Pravartak & MongoDB
(Duration: 9 Months).
Issued Date: August 11, 2026
An IITM Incubated Company Google for Education
Y. ArunPrakash
Arun Prakash M
Founder and CEO
GUVI Geek Network

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