Shrey Jain

I work on AI systems. Currently at Meta.

I'm a data scientist and AI engineer based in San Francisco. Most of my work lives at the intersection of machine learning, operations research, and getting things to production — not just to a notebook.

I've shipped models and systems at Meta, CXApp, TruckX, Dream11, and OYO. The problems change. The goal is always the same: make something that actually works at scale.

Outside of work, I build iOS apps and tools for myself — mostly things I couldn't find and decided to make.

Currently & Recent work

Currently
  • Data Scientist @ Meta
  • Building SYNTH (iOS)
  • Open-source Claude skills
Recent work

A few things I believe about this work:

  • "Models that don't ship are hobbies."
  • "The most important question isn't which algorithm — it's whether anyone will look at the output."
  • "Latency is a feature. So is reliability. They're usually the last things people think about and the first things users notice."
  • "Good ML work is 20% modeling and 80% understanding what the problem actually is. Most people get this backwards."
  • "If you can't explain why the model is wrong, you don't understand the model."
  • "The best data pipeline is the one that's boring to operate."
  • "Optimization problems are everywhere. Most people just call them by other names."
  • "A/B tests tell you what happened. They rarely tell you why. That's where the interesting work starts."
  • "Junior engineers write code. Senior engineers decide what not to write."
  • "I'd rather be 80% right and in production than 99% right in a notebook."

If you're working on something interesting or just want to talk about AI systems, data, or whatever you're building — I'm usually reachable. shrey.jain252@gmail.com