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Soumyajit Nandi

backend engineer · java · spring boot

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available for opportunities

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 Wintel Administrator, where I developed a strong instinct for system reliability, uptime, and enterprise IT operations. That operational 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
Wintel Admin
  • Supported Windows Server administration and enterprise IT infrastructure operations across production environments.
  • Monitored system performance, proactively troubleshot server issues, and maintained high uptime SLAs.
  • Managed user access provisioning, system maintenance cycles, and incident resolution workflows.
  • Collaborated cross-functionally to ensure stable application delivery and production support operations.
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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 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%
Infra & Ops
Windows Server System Monitoring Incident Mgmt User Access Ctrl
Wintel Admin80%

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
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

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