Engineering Jobs at Trajectory
Trajectory has 3 open engineering roles, alongside 1 other open role.
About Trajectory
Trajectory is a research and product lab building a platform for continual learning. The platform helps companies continuously post-train large-scale agentic models using signals from product use, so models can learn and improve over time. Trajectory works with AI companies including Decagon, Clay, Harvey, Mercor, and Rogo.
The open roles
- Member of Technical Staff - Design Eng: San Francisco, posted 26 May 2026.
- Member of Technical Staff - Research: San Francisco, posted 26 May 2026.
- Member of Technical Staff - Generalist: San Francisco, posted 7 May 2026.
Also hiring at Trajectory
Trajectory is also hiring in operations (1).
Its roles are in San Francisco, CA, US (4).
What engineering work involves at an early-stage startup
You own whole parts of the product rather than one service inside a large system. Expect to write the code, deploy it, and get paged when it breaks. Reviews are quick and the codebase is small, so a decision made on Tuesday can ship on Thursday.
Questions people ask
What else is Trajectory hiring for?
Operations: 1 more role.