Open to opportunities

Rupam Karmakar

@rupamkarmakar

Message

Senior Software Developer specializing in Node.js backend and Generative AI integrations.

India

Message

What I'm looking for

I’m looking to build scalable backend systems with Node.js and Microservices, integrate Generative AI features, and drive measurable performance and reliability improvements—working with teams that value secure engineering, clean APIs, and thoughtful execution.

I’m a Senior Software Developer with 8+ years of experience designing and deploying scalable backend architectures. I build high-performance systems with Node.js, SQL, and Microservices, and I enjoy pushing products forward by integrating advanced Generative AI/OpenAI workflows into real applications.

Across ed-tech and large-scale platforms, I’ve optimized database performance, secured sensitive user data, and led full-cycle development—from RESTful APIs (Swagger/OpenAPI) to high-concurrency systems. I’ve also improved reliability through rigorous testing and automated testing practices, including cutting post-deployment bugs and reducing data retrieval time with query and indexing improvements.

Experience

Work history, roles, and key accomplishments

Lead/Senior Software Engineer

Advance Quiz

Apr 2022 - Feb 2025 (2 years 10 months)

Spearheaded end-to-end development of a high-concurrency exam application using Node.js and SQL, engineering a microservices architecture for scalability and fault tolerance. Optimized SQL queries with database indexing, implemented testing and secure authentication protocols, and also built related cross-platform (Flutter/Dart) and SSR/static (Next.js) projects.

Node SQL Microservices Data Indexing Performance Optimization Testing Authentication Flutter Dart Next.js

Senior Software Development Engineer

Cemtrex Labs

Nov 2020 - Feb 2022 (1 year 3 months)

Led backend development for a large-scale e-commerce platform using Node.js and MongoDB, including product catalog management and user authentication. Architected microservices-based social media backends, integrated secure payment/financial transaction systems, and contributed to Generative AI feature integration.

Node MongoDB Microservices Authentication Secure Transaction Systems Generative AI

Senior Software Developer

Claritus Consulting

Apr 2018 - Aug 2021 (3 years 4 months)

Designed and deployed server-side logic for an AI analysis web application integrating AWS services and MySQL databases. Built a lab test report system with Swagger-documented REST APIs and optimized database performance using Sequelize and SQL.

AWS MySQL SQL Sequelize REST APIs Database Optimization Security