Research Engineer, ML Infrastructure for RL Systems

Anthropic is seeking a Research Engineer, Machine Learning (RL Velocity) in London to own and improve the RL training infrastructure used by researchers day-to-day. You will work on core platform components that speed up experiments, reduce runtime variability, and help scale RL workflows across teams.

Collaborating with researchers and adjacent engineering groups (inference, sandboxing, and tooling), you will diagnose bottlenecks, implement robust solutions, and shape how Anthropic does RL at

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