Rajesh Kumar Halder

Hello! 👋

I'm Rajesh Kumar Halder

Full Stack Software Engineer

About Me

I am a Full Stack Software Engineer with experience in building scalable, production-grade systems using React, Node.js, and Python. My expertise includes cloud infrastructure on AWS, backend engineering with FastAPI and Express, AI-driven workflows using AutoGen, and performance-focused system design. I enjoy designing clean APIs, optimizing distributed systems, and building reliable products at scale.

JavaScript TypeScript Python C C++ SQL React Redux Tailwind CSS Material UI Node.js Express.js FastAPI REST APIs WebSockets PostgreSQL MongoDB Redis AWS RDS DynamoDB TypeORM Prisma AWS EC2 AWS Lambda AWS S3 AWS API Gateway AWS Amplify Docker Nginx Kafka AutoGen Agentic AI Git GitLab Postman

Projects

01

TaskFlow Pro

Enterprise task and meeting management platform with real-time updates, background job scheduling, and role-based access control.

PythonFastAPIPostgreSQLAWS RDSWebSocketsJWTAPSchedulerDockerNginx
02

FolksLet

Full-stack social media application featuring secure authentication, real-time chat, and scalable backend APIs.

ReactNode.jsMongoDBSocket.IOJWTNginx
03

Black Rhino – Automated BRSR System

AI-driven BRSR report generation system using AutoGen agents and FastAPI microservices with scheduled workflows.

PythonFastAPIAutoGenAgentic AIKafkaAWS EC2AWS S3Docker

Experience

Associate Software Engineer

Gabriel & Co

Mar 2025 – Present
  • Built and optimized Python-based media processing pipelines handling 50K+ assets using AWS S3 and EC2.
  • Developed backend services with Node.js using TypeORM and Prisma with PostgreSQL on AWS RDS.
  • Designed and deployed internal tools using Docker and Nginx, improving system reliability and performance.

Full Stack Engineer

Inventic AI

Sep 2024 – Mar 2025
  • Architected FastAPI microservices with Kafka-based event processing for transaction monitoring.
  • Integrated AutoGen-powered agent workflows for intelligent negative news detection.
  • Deployed production systems on AWS EC2 with Dockerized services and Nginx reverse proxy.

Full Stack Developer Intern

Vitto Money

Mar 2024 – Sep 2024
  • Implemented backend services using Node.js and PostgreSQL with Prisma ORM.
  • Worked on secure API integrations and performance optimization in a fintech environment.

Education

B.Tech in Computer Science and Engineering

Government College of Engineering and Textile Technology, West Bengal

2020 – 2024
  • CGPA: 8.68

Higher Secondary & Matriculation

Bongaon High School, West Bengal

2017 – 2020
  • Intermediate: 96.8%
  • Matriculation: 87.71%