Mercor is hiring Senior Software Engineers to work on a project with a leading AI research lab. You'll apply your open-source engineering experience to real software engineering work. You're a good fit if you: Work as a Senior, Staff or Principal Software Engineer (or equivalent senior individual contributor) Actively contribute to open-source projects, with merged pull requests or commits in the last 6 months Maintain or contribute to projects with real adoption, such as 100+ GitHub stars or transparent package usage