Principal engineer for AI, cloud and performance.

I'm Andrei Sfat. I help teams get more out of AI, cut latency, and harden and automate the infrastructure underneath it all. Consulting and contract work, remote.

Andrei Sfat

Where I help

Selected work

A platform built from zero

AWS, Terraform and EKS for a real-money sports product in the US, with CI on GitHub Actions. I led the DevOps team that runs it.

Latency, traced end to end

Followed slow requests from the phone to the database on a live sports app, found where the time went and lined up the few fixes that matter: query patterns, payload size, caching.

A hacked publication, recovered

Brought back every deleted article after a CMS exploit, then patched the servers and put them behind Cloudflare.

Things I build

Products I designed, built and run myself, end to end.

Voyagen home screen with a trip to Tuscany, weather and packing progressVoyagen list of upcoming tripsVoyagen trip summary for BarcelonaVoyagen packing preferences stepVoyagen travel details step
Scroll through the app

Voyagen

A travel packing app. Tell it where you're going: it reads the forecast, builds the list, and keeps the whole family in sync in real time.

React Native · WebSockets · Postgres · Fly.io

Visit voyagen.app
The live app: scroll inside the phone

Meal Plan

A weekly meal planner: meals by day with calories and protein, recipes, and supplement reminders, in English and Romanian.

React · TypeScript

Open Meal Plan

Writing

Track record

  • Engineer, now principal · Real-money sports platform, US market2023 to now
  • Lead Developer, contract · Crypto exchange2022 to 2023
  • Senior Software Developer · Winnow Solutions2021 to 2022
  • Open source developer · Snyk2019 to 2020
  • Team Lead · iWelcome (now OneWelcome)2016 to 2021
  • Software Developer · Artisan Infrastructure2015 to 2016
  • Java Developer · 3Pillar Global2011 to 2015