Projects
A collection of my recent work and personal projects
April 2026 / Full Stack / AI Systems
A full-stack RAG application where users upload documents and chat with them via natural language. Built to go deep on retrieval pipeline architecture — not just use the abstractions. Key decisions: dual-namespace Pinecone scheme (userId + projectId) for multi-tenant vector isolation and safe project deletion; custom sentence-aware chunking at 500 tokens with 50-token overlap tuned for retrieval precision over naive splitting; streaming chat UI for real-time response feel. Evolved the data model from a shared global namespace after discovering cross-document context bleed degraded retrieval quality.
May 2025 / Full Stack
Financial calculator suite covering FD, RD, PPF, SIP, and Gold Loan EMI calculations with interactive graphs and a daily finance quotes feed served via Google Sheets API.
February 2023 / Backend / Web3
UPI payment system backed by Ethereum smart contracts, with Solidity contracts exposed via REST API. Backend secured with JWT and MetaMask auth; containerized with Docker and deployed on DigitalOcean. Won Diversion 2023 — Kolkata's first MLH Hackathon.