Model Engineer, RL Training Framework is open at xAI in Palo Alto, CA. The posting gives a salary of $160K - $250K. Posted on Jul 14, 2026, and still on xAI’s careers page when we last checked, on Nov 14, 2026.
About the role
Design and implement the systems backing all RL workloads at SpaceXSI, from small scale ablations to production training runs Profile, debug, and optimize end-to-end training performance Improve scalability and observability of the RL stack BASIC QUALIFICATIONS: Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++ PREFERRED SKILLS AND EXPERIENCE: Experience building, debugging, and…
The opening lines of the posting. The rest is on xAI’s careers page.
Hiring at xAI
xAI has 296 open roles right now, 20 of them remote. Most are in Engineering, Manufacturing & Trades and Operations. The median advertised salary across its roles with a published range is $205K. See all its roles
