Research Engineer, RL Scaling Science at Anthropic Limited
Anthropic Limited · London, UK
- Occupation group: Software & IT
- Licensed sponsor: Anthropic Limited
Employer on register 23 October 2026 Ad mentions sponsorship
From the advert
About Anthropic
Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems.
About the role
Anthropic's RL Scaling Science team studies how reinforcement learning behaves as we scale it (across model size, compute, and task horizon) and turns that understanding into the training recipes behind our frontier models. As a Research Engineer on this team, you'll design and run large-scale experiments to understand and resolve bottlenecks, build the benchmarks that make long-horizon progress measurable, and ship validated findings directly into production training.
This role lives at the boundary between research and engineering. The problems are open, the experiments run at frontier scale, and the path from a robust result to production is short.
Key responsibilities
Design, run, and interpret large-scale RL experiments, reasoning rigorously about what the data does and doesn't show
Investigate how RL improves as horizon, compute, and model size grow
Build and maintain benchmarks for long-horizon RL so progress is measurable and reproducible
Translate validated findings into production training recipes, exercising judgment about when a result is robust enough to ship
Debug complex issues at the seam where research meets infrastructure - failures that only appear at scale
Partner closely with adjacent RL teams across research and engineering and advance our overall RL stack
Minimum qualifications
Strong empirical research skills in Reinforcement Learning, large-scale ML training, or a closely adjacent area
Demonstrated ability to own large experiments end-to-end, from design through interpretation
Proficiency in Python and experience working with large-scale or distributed ML systems
Comfort operating at the…
Advert text as supplied by the employer's job board; it may be a shortened extract.
Summary
Research Engineer, RL Scaling Science at Anthropic Limited in London. Anthropic Limited is listed on the Home Office register of licensed sponsors (23 October 2026). Read the full job advert and apply on the employer's or job board's site. A sponsor licence means the employer is on the Home Office register. It does not mean this role is sponsored. Check with the employer. This is not immigration advice.
Read the full advert and apply
A sponsor licence means the employer is on the Home Office register. It does not mean this role is sponsored. Check with the employer. This is not immigration advice.