Backend Software Engineer | 7+ yrs
Node.js • AWS • Serverless • GraphQL • React.js • TypeScript • Javascript • Express.Js
- Mail Wise — AI email validation (Gemini models, Next.js, Firestore). Demo: https://www.mailwise.in
- Scribble Rx — AI prescription transcription. Demo: https://studio--scribblerx.us-central1.hosted.app/login
- Scaled serverless backend to 99% uptime for production workloads.
- Reduced WebSocket latency 200ms → <5ms by designing a LAN WebSocket approach.
- Implemented VTL GraphQL resolvers to cut compute time 40%.
- Mentored engineers and led backend features across gaming, streaming, and SaaS.
- Email: karthikeyansundaram2@gmail.com
- LinkedIn: https://www.linkedin.com/in/karthikeyan-s-264320171/
- Demos & repos pinned below 👇
(Pinned repos show here on my profile — check Mail Wise and Scribble Rx for live demos and setup instructions.)

