🔐 Security & API Design

JWT auth + RBAC across 10+ REST endpoints and 3 user roles — hardened with rate limiting, CORS and Helmet.js.

⚡ Performance

Cut response time ~30% on high-traffic endpoints through PostgreSQL indexing and query optimisation.

🧠 Retrieval Engineering

Hybrid BM25 + HNSW retriever with Reciprocal Rank Fusion (BAAI/bge-m3, 1024-dim) in Weaviate, evaluated with RAGAS.

Multi-Article RAG Research Assistant
Paste news URLs → ask anything → get cited, streamed answers.

• Hybrid retrieval — BM25 (35%) + dense HNSW (65%) over BGE-small embeddings
• Cross-encoder reranking — ms-marco-MiniLM narrows top 24 → top 6
• SSE streaming answers with per-claim source citations
• Intent routing escalates summary/comparison queries to a stronger model

Event Companion Platform
Discover events near you, join groups, get promoted off the waitlist.

• Sub-100ms distance-ranked search via PostGIS geospatial indexing
• JWT refresh-token rotation for stateless, revocable sessions
• Role-based group join approval + automated waitlist promotion
• Flyway-managed migrations, containerised and deployed on Render

Inventory & Order Management Platform
Run a business's catalog, stock and orders — with every movement auditable.

• Row-locked order placement — two staff racing on the last unit resolve correctly, with idempotency keys blocking duplicate submits
• Append-only stock ledger — every movement recorded with a running balance, so current stock is derivable rather than asserted
• Scoped data access across Owner / Manager / Staff roles — a wrong-org record returns 404, not 403
• Razorpay webhooks verified against raw request bytes; refresh-token rotation with reuse detection

Intelligent Delivery Route Optimizer
Cluster orders geographically, sequence stops, cut fuel and emissions.

• K-Means++ clustering → Nearest-Neighbour TSP, written from scratch in pure Python — no ML-library wrappers
• Haversine distance + linear ETA model over MongoDB 2dsphere indexes
• Optimisation core has zero FastAPI/Motor imports — fully unit-testable
• Role-split UI: admin dispatch console + driver route map

💻 Backend Developer Intern
Atal Innovation Centre, Delhi
Jun 2024 – Jan 2025

🎓 B.Tech, Computer Science & Engineering
IIIT Manipur
Sep 2023 – Aug 2027

🥈 AIR 2 — Engineer's Ring of Honour 2025
Naukri.com, among IIT / IIIT / NIT participants — scholarship awarded and featured in Times of India

🌍 Rank 5,204 globally — Meta Hacker Cup 2025
Cleared Round 1 among hundreds of thousands of competitors

📡 Top 3 proposals at IIIT Manipur
5G Innovation Hackathon 2025, Dept. of Telecommunications, Govt. of India

🎯 Qualified GATE CS 2026