Rathina Boopathi Sundarraj
Passionate Full-Stack Developer (MERN) with expertise in building and scaling web applications. Skilled in implementing AI Agentic Workflows (LangChain & CrewAI) and leveraging DevOps practices to streamline deployment and optimize system performance. Experienced in guiding projects through the full lifecycle and contributing to team success in a dynamic development environment.
Experience
AI Full Stack Engineer, Kim.cc
Dec 2025 — Present
- Built the core AI tool-server in Go — the execution backbone of the AI platform — contributed to Shadow AI and intent classification, and owned containerization and AWS ECS deployment for the company's entire application fleet.
- Developed the Chrome-extension AI overlay that became the flagship product for third-party helpdesks, and the Shadow Report — the definitive metric for AI performance and usage.
Team Lead — Tech, Prodoc AI
Mar 2025 — Dec 2025
- Led a team of 5 engineers to deliver healthcare solutions faster by optimizing the development lifecycle and automating DevOps workflows; built low-latency, multilingual AI voice agents for real-time interactions.
- Spearheaded the architecture and launch of a patient-partner engagement platform, enhancing communication efficiency for partner hospitals.
Senior Software Engineer, Prodoc AI
Nov 2024 — Mar 2025
- Led ConsultEasy — a WhatsApp-only preconsultation platform with multi-agent workflows, multilingual support and long-term memory.
- Built an in-house subscription management system replacing ChargeBee, plus a plug-in integration layer for CRMs and HIMS.
- Founding engineer at Prodoc AI — joined at the earliest stage and helped build the product from the ground up.
- Key contributor to an AI patient engagement platform using Meta Graph APIs and LangChain for WhatsApp-first care.
- Built a full clinic management system with AI-powered appointment booking and real-time prescription writing.
Software Engineer, Travelfika
May 2023 — Oct 2023
- Built airport-transfer and activities booking engines on Amadeus and Viator APIs.
- Revamped the hotel booking front end and cut search response time fourfold.
- Founding engineer at Travelfika — worked directly with the founder building the platform from day one.
- Sourced inventory providers for activities and hotels, then designed flight search and an end-to-end activities search engine on the Viator API.
Skills
Frontend
React.js, Next.js, Tailwind, Antd, MUI, TypeScript
Backend
Node.js, Express.js, Python, FastAPI, PHP
Databases
MongoDB, MySQL, PostgreSQL
AI Agent Frameworks
LangChain, CrewAI
Payment Gateways
Razorpay, RazorpayX, Stripe
Infrastructure & DevOps
AWS, Azure, GCP, Docker, Vercel
Tools
Trello, Jira, Figma, Plane
Projects
A high-performance order-matching engine for stock and crypto trading. Price-time priority with partial fills, per-symbol order books, and lock-sharded concurrency — B-trees for O(log N) price lookups, hashmaps for O(1) cancels. Benchmarks at ~92K ops/sec with a 3.5ms median latency, exposed over a REST API.
A minimal, production-ready route analytics npm package for Express.js. Tracks every request — latency, status codes, request metadata, IP address and errors — and stores it asynchronously in MongoDB using BullMQ + Redis.
A conversational AI that streamlines email communication through WhatsApp — summarising lengthy emails, enabling direct replies from chat, and supporting Indic languages.
Education
Bachelor of Engineering
Government College of Technology, Coimbatore
Aug 2019 — Apr 2023 · CGPA 8.0