AI startup building systems that operate across every surface people already use.

Senior/Staff Full Stack Software Engineer

San FranciscoOn-site$200K - $300K5 - 10 years
You'll spend mornings refining the TypeScript and NodeJS backbone that routes context between local models and cloud inference, then afternoons tuning React interfaces where users actually steer the AI. Sometimes you'll drop into C/C++ or Swift when latency matters—building the bridge between raw silicon performance and something a person wants to touch. This is a nine-person team with real funding and no time for theater; your code ships to users within days, not quarters.

What they're looking for

  • 5+ years shipping production full-stack systems, with serious depth in TypeScript, NodeJS, and React
  • Track record of building products where AI behavior is surfaced directly to consumers, not buried in backend pipelines
  • Comfortable writing and reviewing C/C++ or Swift when the problem demands native performance, not just the technologies you prefer
  • Experience on teams small enough that you could name every person's core strength— you know what ownership actually means
  • Based in or willing to relocate to San Francisco; this team shares space deliberately

Tech stack

TypeScriptNodeJSReactCC++Swift

Apply for this role

This role is one we're recruiting for on behalf of a client company; the client's identity is kept confidential at this stage. A Fluency recruiter will follow up with details.