Saransh Halwai

Production-grade logistics routing and vehicle assignment engine driven by Graph ML and Reinforcement Learning.

• Architected a supply chain simulation environment mapping 40 Indian logistics hubs, engineering a custom stochastic anomaly engine to inject real-time weather and traffic disruptions.
• Trained an end-to-end Heterogeneous Graph Transformer (HGT) and Proximal Policy Optimization (PPO) agent using a 3-phase curriculum, outperforming static greedy baselines in high-volatility scenarios.
• Deployed the real-time simulation engine to Google Cloud Run, streaming graph state via WebSockets to a React/Leaflet dashboard, and integrating Vertex AI (Gemini 2.5 Flash) to generate natural-language routing explanations.

A resilient, multi-agent Corrective RAG (CRAG) pipeline designed for low-hallucination institutional knowledge retrieval.

• Engineered a dynamic, multi-agent RAG chatbot utilizing the Pathway framework's Rust-based engine, indexing unstructured data scraped from ~150 institutional websites and PDFs.
• Architected a Corrective RAG (CRAG) pipeline featuring specialized LLM routing and sub-query generation agents to process complex, multi-step queries.
• Implemented an automated Critique Agent to evaluate answer relevancy, automatically forcing document re-retrieval and answer regeneration if the confidence score fell below 0.80.
• Containerized the agentic backend via Docker, deploying the REST API on Render and a React-based frontend on Vercel.

A real-time, multiplayer gaming arena and competitive programming strategy wrapper layered on top of the Codeforces API.

• Architected a real-time multiplayer competitive programming platform by integrating the Codeforces API, expanding an open-source engine with complex game modes (Ticket to Ride, Tug of War).
• Synchronized multiplayer game state and board mutations in real-time by implementing full-duplex WebSocket connections via Pusher within a Next.js frontend.
• Designed a highly normalized relational database schema using Prisma ORM and deployed a serverless PostgreSQL (Neon) database instance to manage concurrent user sessions, game progression metrics, and API polling rate constraints.

Enterprise-grade full-stack Geographic Information System (GIS) built for state-wide groundwater telemetry mapping.

• Engineered a full-stack Geographic Information System (GIS) to visualize state-wide groundwater telemetry data and complex river basin topologies.
• Developed a high-performance React/TypeScript mapping interface utilizing Leaflet.js, optimizing the rendering of extensive GeoJSON FeatureCollections (continuous LineStrings and multi-vertex Polygons) with dynamic layer toggling.
• Implemented a secure JWT-based Role-Based Access Control (RBAC) mechanism protecting admin-only FastAPI endpoints that process the ingestion and coordinate transformation of zipped Shapefiles into EPSG:4326 PostGIS database tables.

Interoperable, intermediary-free music streaming platform powered by on-chain micro-payments and decentralized content routing.

• Architected a full-stack Web3 music streaming platform on the Ethereum Sepolia testnet, using Next.js with ethers.js and Pinata IPFS for immutable, decentralized storage of audio assets and metadata.
• Engineered a custom suite of OpenZeppelin-secured Solidity smart contracts to coordinate instant ETH tips, ERC-721 collectibles embedded with ERC-2981 standard royalty parameters, and an ERC-20 tokenized governance network for decentralized copyright dispute claims.
• Optimized EVM compilation and gas efficiency by replacing standard string require checks with custom error structures (saving ~8,000 gas on deployment) and utilizing low-level calldata pointers to minimize expensive memory allocation routines during track ingestion.