Sr. Model Engineer, RL Inference is open at xAI in Palo Alto, CA. The posting gives a salary of $160K - $250K. Posted on Jul 6, 2026, and still on xAI’s careers page when we last checked, on Nov 14, 2026.
About the role
Design and optimize our inference stack for all shapes of RL workloads at SpaceXSI, from small scale ablations to production training runs Analyze, profile and address performance bottlenecks in large scale RL systems Work closely with the modeling team to efficiently implement novel RL techniques and algorithms BASIC QUALIFICATIONS: Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++…
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
