Asit Kumar

Knowledge Excel Pvt Ltd Mar 2026 – Present

Backend Developer Trainee Delhi, India

• Built RESTful APIs in Python (FastAPI) for core product modules, structuring services around a microservices architecture.
• Implemented JWT authentication with token refresh and session management across 8+ API endpoints.
• Optimized PostgreSQL queries and added indexing to reduce API response latency.
• Integrated AWS S3 for cloud file storage and implemented an initial RAG retrieval pipeline using vector embeddings for AI-powered search.
• Used Git for version control within an agile workflow, participating in code reviews and deployment.

Webapphealing Technology Pvt. Ltd. Dec 2025 – Feb 2026

Backend Developer Intern Noida, India

• Built 12+ RESTful API endpoints using Node.js and Express.js, following MVC architecture.
• Implemented JWT authentication and Role-Based Access Control (RBAC) to manage protected access across user roles.
• Built reusable middleware for request validation, centralized error handling, and logging to improve service maintainability.
• Applied asynchronous request handling and API-level optimizations to improve backend throughput.

Smart Food Waste Reduction Platform

Backend system for a donation platform connecting food donors with NGOs in real time.

• Designed and built the backend using Node.js, Express.js, and MongoDB, with geospatial indexing to support location-based donor-to-NGO matching.
• Implemented JWT authentication and RBAC for multi-role access: donors, NGOs, and admins.
• Built a matching algorithm combining distance scoring, urgency level, and NGO capacity to rank donation-to-recipient pairings.
• Used Socket.io for real-time donation status updates and Redis caching to reduce repeated database load on high-traffic endpoints.

Tech stack: Node.js, Express.js, MongoDB, Redis, Socket.io, JWT, RBAC, OpenStreetMap API

EchoSphere — Real-Time Chat Application

Backend for a real-time messaging platform with secure authentication.

• Built an event-driven messaging backend using Node.js and Socket.io to handle real-time message delivery.
• Implemented JWT authentication, OAuth 2.0, and bcrypt password hashing for secure user access.
• Designed RESTful APIs with Express.js middleware, including rate limiting to protect against abuse.

Tech stack: Node.js, Express.js, MongoDB, Socket.io, JWT, OAuth 2.0, bcrypt