AI & Full Stack Engineer — scroll to start the engine

Rathina Boopathi Sundarraj

I take ideas from the first sketch to a shipped product — owning the frontend, the backend, the infra, and the AI in between. When it takes a team, I lead it.

0×
Founding engineer
01
Products built from scratch
0+
Years shipping to production
  • TypeScript
  • Node.js
  • React
  • Next.js
  • MongoDB
  • PostgreSQL
  • LangChain
  • CrewAI
  • Python
  • FastAPI
  • AWS
  • Docker
  • Redis
  • Tailwind

01 / About

Engineer who ships products.

I turn ambitious ideas into products people actually use owning the whole arc, from the first sketch to production. I care about how it feels, not just whether it compiles, and I build things that hold up under real load.

Rathina Boopathi Sundarraj
Rathina Boopathi SundarrajBangalore, IN
01

Full-Stack Development

React, Next.js, Node and Express — I build the whole product, from the pixel-level UI down to the services and APIs behind it.

02

AI & Agentic Systems

LangChain and CrewAI agents built into real products — turning models into features people can actually rely on.

03

Product & UX Sense

I sweat the details users feel: flows, empty states, and the small interactions that make a product click.

04

Databases & Data

MongoDB, PostgreSQL and MySQL — data models that stay fast and honest as a product grows.

05

Cloud, DevOps & Scale

AWS, GCP and Docker with clean CI/CD — shipping often and keeping products up under real traffic.

06

Payments & Integrations

Razorpay, Stripe and third-party APIs — subscriptions, payouts, and the plumbing that connects products to the world.

02 / Experience

Where I've shipped.

Full resume

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.

Software Engineer Prodoc AI

Founding EngineerNov 2023 — Oct 2024
  • 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.

Full Stack Intern Travelfika

Founding EngineerMay 2022 — Apr 2023
  • 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.

03 / Selected Work

Projects that shipped.

Order Matching Engine

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.

GoREST APIConcurrencyDockerKubernetes

Traxx

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.

Express.jsMongoDBRedisBullMQNode.js

WhatsMail

A conversational AI that streamlines email communication through WhatsApp — summarising lengthy emails, enabling direct replies from chat, and supporting Indic languages.

AIWhatsAppLangChainNode.jsMongoDB
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05 / Contact

Let's build
something great.

Have a question, an idea, or a role you think I'd be a fit for? My inbox is open.

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