saikat.
Résumé

Engineered
for impact.

I turn complex problems into reliable backend systems. Java, Spring Boot, and a little obsession with getting the details right.

Explore my work Let’s talk

Kolkata, India Open to opportunities

4+ yearsEnterprise engineering
CapgeminiSenior Consultant
Backend first.From architecture to production
Take a closer look
JavaSpring BootREST APIsSQLMicroservices

01 / Selected work

An idea, taken all the way.

Beyond the
happy path.

Because the interesting engineering happens when payments, permissions, and real data meet.

FEATURED / 001

Mercato

eCommerce, end to end.

A multi-role marketplace built from scratch, with secure APIs, transaction-aware inventory, real payments, and cloud deployment.

Java 17Spring BootPostgreSQLSpring SecurityOCI
Visit live project GitHub

Backend architecture & implementation by me. React frontend built with generative AI assistance.

Under the hood Architecture & engineering decisions
01 / Data integrity

Inventory with a source of truth.

Delta-based stock reservation and PostgreSQL transactions keep inventory decisions on the backend throughout the order flow.

02 / Security

Three roles. Clear boundaries.

Spring Security and stateless JWT authentication enforce customer, seller, and admin access across separate workflows.

03 / Payments & delivery

Beyond a local demo.

Cashfree integration with backend-verified webhooks. Spring Boot on Oracle Cloud Infrastructure behind Nginx, with a React and Redux Toolkit frontend.

React + Redux ToolkitSpring Boot + SecurityPostgreSQL

02 / Experience

Real teams. Real systems.

Built in the
real world.

Four-plus years turning enterprise retail requirements into services that work, day after day.

Senior Consultant

Current role

Production stability & system reliability

  • Resolved a daily connection issue on a business-critical operations dashboard with a session-initialization fix, replacing a scheduled keep-alive workaround.
  • Built and consumed REST APIs across independently deployed microservices on a retail platform.
JavaMicroservicesSession management

Consultant

Apr 2024 — Mar 2026

Backend services, API design & security

  • Built Java services with Spring Boot, Hibernate/JPA, and SQL Server, improving team productivity by 50% and reducing manual effort by 90%.
  • Implemented JWT authentication, role-based authorization, and audit logging with Spring Security.
  • Designed retail APIs and worked with clients on requirements and solution validation.

Associate Consultant

Aug 2022 — Mar 2024

Automation, reporting & data systems

  • Developed Java and Spring Boot automation that reduced manual data processing by 40% and improved report generation speed by 60%.
  • Wrote SQL queries and stored procedures for retail reporting and data validation.

03 / The toolkit

Depth where it matters.

Java at the core.
Curiosity everywhere.

Tools I use to build, secure, and deliver dependable systems.

Backend engineering

Java 8, 11 & 17 · Spring Boot · Spring MVC · Hibernate / JPA · REST APIs · Microservices

Security & data

Spring Security · JWT · RBAC · PostgreSQL · SQL Server · Azure SQL · MongoDB · Apache Kafka

Build & delivery

OCI · Nginx · Git · Maven · CI/CD · Azure CLI · Agile / Scrum · SOLID principles

Also in my toolkit

JavaScript, React, and Redux Toolkit for personal projects, with generative AI supporting frontend implementation.

04 / A little about me

The person behind the code.

Practical mind.
Builder’s instinct.

I’m Saikat, a Java Developer based in Kolkata. I like making complex systems feel simple — especially for the people who depend on them.

At Capgemini, I work on enterprise retail services, from secure APIs and automation to production reliability. I care about clean architecture, maintainable code, and fixing the cause of a problem.

Outside work, I build personal projects to explore the full journey from an idea to a deployed product. My core craft is backend engineering; tools like React and generative AI help me bring those ideas to life.

Explore my toolkit
Education

National Institute of Technology, Durgapur

B.Tech, Civil Engineering · 2018 — 2022

Continued learning / Feb 2026Java Spring Boot Full StackUdemy · Faisal Memon (EmbarX)

05 / What’s next?

Open to opportunities

Good things start
with a conversation.

Looking for a Java Developer?
I’d love to hear what you’re building.