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Research Engineer, RL Scaling Science

London, UK💼 Full-time💰 $375,000–$375,000🗓 2026-06-22 → 2026-09-26

Core

Design and run large-scale reinforcement learning experiments to understand scaling behaviors and resolve bottlenecks, translating validated findings into production training recipes for frontier AI models.

Role type

Research Engineer, RL Scaling Science

Builds

Benchmarks for long-horizon RL and production training recipes

Domain

Artificial Intelligence, Reinforcement Learning, Large-scale ML

Deliverable

production ML models

Required skills

Empirical research in Reinforcement Learning, End-to-end experiment ownership, Python proficiency, Large-scale/distributed ML systems experience, Debugging research-infrastructure interfaces

Preferred skills

Published/shipped work in long-horizon RL, Experience translating research to production, Large-scale industry impact via RL, Frontier-scale training run experience

Technologies

Python, Distributed ML systems

Responsibilities

Design, run, and interpret large-scale RL experiments; Investigate RL improvements with growing horizon, compute, and model size; Build and maintain benchmarks for long-horizon RL; Translate validated findings into production training recipes; Debug complex issues at the research-infrastructure seam; Partner with adjacent RL teams to advance the RL stack

Seniority

Mid-to-Senior, hands-on IC

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