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noah lemen noahlemen

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hi, i'm noah!

i'm a software engineer on the web platform team at Airbnb. before that i spent six and a half years at Meta on React and web infrastructure, with a batch at the Recurse Center in between

open source highlights

  • React · former core team member. coordinated a company-wide deprecation of legacy APIs across thousands of callsites and helped unblock open-source React development. in the open-source repo: worked on the scheduler (scheduler.yield, postTask), cleaned up deprecated APIs and feature flags, ran experiments on Activity, and supported the React 19 release.

  • flow-api-translator · took this from prototype to production (commits) with the Flow team. translates Flow source into .d.ts and plain JS for TypeScript interop with Flow-typed code. adopted in StyleX, Metro, and React Native, where it powers RN 0.80's strict TypeScript API.

  • Chromium & web standards · removed unload handlers from Facebook's tracking pixel, one of the most widely deployed scripts on the web, unblocking bfcache eligibility for millions of pages. drove the Service Worker Subresource Filter from spec proposal through implementation and origin trial on facebook.com; Chrome 123 later shipped the Static Routing API to solve this more broadly.

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  1. The library for web and native user interfaces.

    JavaScript 244k 50.7k