Saurabh Kumar
Principal Engineer, Fueled

I architect data-heavy backends — and the AI now riding on top of them — for teams that can't afford to get it wrong.

Fourteen years architecting backends across healthcare, fintech, media, and edtech — HIPAA patient portals, an investing platform, real-time community feeds. The language matters less than I used to think (Python, Node, Go, whatever the job wants); the judgment matters more — where the connection pool gives out, which async boundary leaks, what a bad abstraction costs three years on. Most of the real work is there. Lately it’s gone into AI-in-the-loop systems: keeping LLMs grounded, RAG that cites its sources instead of making things up.

Off the clock, I’m on the outskirts of Delhi with my wife, my son Amay, and our dog Hachi, who all do a fine job of keeping me away from the keyboard.

Open source
8.8k stars on GitHub

python-dotenv

The library Python developers reach for to read configuration from .env files. Maintained by me since the early days.

Now

Leading Web Services at Fueled

Building products with AI and blockchain at their core. And learning to keep up with a toddler.

Worked with
The Motley Fool Apple Revzilla Goosehead Insurance Victoria's Secret NationsBenefits 2NDFLOOR EverFi South Pole
Working together

Mentoring & consulting

Pro-bono mentoring for early founders, and independent consulting on problems worth the time. Terms tailored to the work.