Foundry (YC F24) Is Hiring – Founding Engineer (ML × SWE)

Stop building GPT wrappers. Build a world model instead. Why Foundry exists: Every SaaS app, enterprise tool, and internal workflow without an API will soon be automated by browser agents—not traditional API integrations. Tens of trillions of dollars in global labor depend on browser-based workflows that no AI system can reliably automate today. But browser agents right now are like GPT-1: impressive demos, but brittle and broken in practice. To scale browser agents from GPT-1 demos to GPT-4 reliability—and unlock this enormous economic leap—they need purpose-built infrastructure: Hyper-realistic, deterministic web simulations Comprehensive annotation framework for labeling and debugging Reliable benchmarks immune to web drift, IP bans, and rate limits Robust RL training environments and infrastructure No one's built it yet. We're going first. We’re building exactly this—core infrastructure designed from first principles, specifically for browser agents. No incremental tools, ... Read full article.