Portfolio

About

I’m a Backend & Infrastructure Engineer with hands-on experience building scalable, secure, and production-ready backend systems. I focus on designing APIs, databases, and cloud infrastructure that power real-world applications.

I work primarily with Node.js, Express, PostgreSQL, and cloud platforms, building backend services that are reliable, maintainable, and optimized for performance.

I’ve built REST & GraphQL APIs, implemented authentication & authorization systems, designed efficient database schemas, and integrated Stripe-based payment flows for SaaS and product-based applications.

Experience

Backend Developer Intern

Main Flow Services & Technology · Jun 2024 – Aug 2024 · Remote

Built a backend user management system with user registration, authentication, and role-based access control (RBAC).
Implemented JWT-based access & refresh tokens for secure, stateless authentication.
Designed RESTful APIs with input validation and centralized error handling.
Integrated relational databases for secure and efficient user data management.
Tested and debugged APIs using Postman, improving reliability and security.

Projects

Authentication & Authorization System

GitHub

Node.js · Express.js · JWT · PostgreSQL

Built a secure, stateless authentication system using JWT access & refresh tokens. Implemented role-based access control (RBAC), bcrypt password hashing, and middleware-driven authorization following security best practices.

Integrated Badminton Match Analysis System

GitHub

Computer Vision · Deep Learning · YOLOv8 · CNN–Transformer

Authored and presented an IEEE Silchar Conference 2025 paper on automated badminton analysis. Achieved 94.12% mAP@0.5 for shuttlecock detection and 0.92 IDF1 for player tracking. Designed a CNN–Transformer model achieving 77.8% Top-1 and 94.24% Top-5 accuracy.

URL Shortener Service

GitHub

Node.js · Express.js · PostgreSQL

Developed a scalable URL shortener with collision-resistant short code generation and low-latency redirection. Added click analytics and built REST APIs with validation and centralized error handling.