---
title: "Swapan Kumar - Independent Backend Consultant / Freelance Software Engineer in Greater Bengaluru Area | Tal"
description: "Meet Swapan Kumar, Full Stack MERN Developer | Backend Engineer | Node.js | NestJS | React | TypeScript | MongoDB | PostgreSQL | AWS | Docker | Immediate Joiner based in Greater Bengaluru Area. AI stack includes antigravity, claude code, and cursor. Explore public work links including github."
image: "https://tal.club/meet/swapan-kumar-sardar/share-image"
---

# Swapan Kumar on Tal

## Headline

Full Stack MERN Developer \| Backend Engineer \| Node\.js \| NestJS \| React \| TypeScript \| MongoDB \| PostgreSQL \| AWS \| Docker \| Immediate Joiner

## About

Full Stack MERN Developer & Backend Engineer with 4\+ years of professional experience design\-engineering scalable web applications, robust financial engines, and real\-time distributed systems\. Expert at bridging responsive frontend architectures with microservices backends, focused on performance optimization and high\-concurrency environments\. Specialized in building end\-to\-end multi\-tenant platforms, optimizing complex relational and NoSQL database layers, implementing secure OAuth2/RBAC authentication engines, and deploying containerized cloud infrastructures\. CORE TECHNICAL STACK • Frontend Development: React, Next\.js \(App Router\), Redux Toolkit, TypeScript, JavaScript \(ES6\+\), Tailwind CSS • Backend & Runtimes: Node\.js, NestJS, Express\.js, TypeScript, Ruby \(Sinatra\) • APIs & Architecture: GraphQL, Apollo Federation, RESTful APIs, Microservices, WebSockets \(Socket\.io\) • Databases & Cache: PostgreSQL, MongoDB, Redis, Prisma, TypeORM, PostGIS \(Spatial Geography\) • Cloud & DevOps: AWS \(EC2, S3, CloudFront, Lambda\), Docker, GitHub Actions \(CI/CD\), Nginx • Security & Auth: Keycloak OAuth 2\.0, JWT, Role\-Based Access Control \(RBAC\), Firebase Auth Open to Full Stack Engineer, MERN Developer, and Backend Engineer opportunities\. Immediate Joiner \| Open to Relocate to Bengaluru, Gurugram, and Hyderabad hubs\. 📧 ssardar385@gmail\.com \| 📱 \+91 9304220627

## Location

Greater Bengaluru Area

## AI stack

antigravity

claude code

cursor

gemini

lovable

## Work experience

Independent Backend Consultant / Freelance Software Engineer at Freelance Consulting, Oct 2025 \- Present · 1 yr, Sahibzada Ajit Singh Nagar, Punjab, India, Delivering scalable backend architecture, payment processing pipelines, and multi\-tenant platforms for client products: ▸ HappyBoards \(OMS Platform\): Engineered a multi\-tenant order fulfillment engine with Next\.js, Node\.js, Prisma, PostGIS spatial geofencing, Socket\.io real\-time order states, and Stripe payment webhooks\. ▸ Flux Payment Service: Built high\-security ACH/ICL payment processing pipelines, automated bank reconciliation logic, and Keycloak OAuth2/RBAC security using NestJS, PostgreSQL, TypeORM, and AWS S3/SFTP\.

Expandimo at Expandimo Technologies Private Limited, Apr 2022 \- Oct 2025 · 3 yrs 7 mos, Mohali, Designed, developed, and deployed high\-performance backend services and microservices using Node\.js, Express, TypeScript, MongoDB, and GraphQL, while architecting backend solutions for selected client projects\.

## Education

Bachelor of Technology \- BTech, CSE, Swami Vivekanand Institute of Engineering & Technology, Banur

## Public links

- github: https://github\.com/vikaskumarsardar

[View the original profile](https://tal.club/meet/swapan-kumar-sardar)

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