Research Scientist / Engineer – Reinforcement Learning Infrastructure at Lumaai | KeyStep

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Research Scientist / Engineer – Reinforcement Learning Infrastructure

Lumaai

London, UK

about 6 hours ago

full-timeremoteResearch & AI

Skills & Technologies

GoMakeTrainingResearch

Job Description

You'll build the systems that make reinforcement learning work at frontier scale — coupling policy optimization with large fleets of inference workers, agentic environments, and the reward and verification systems that turn model behavior into learning signal. RL is how Luma's models go from capable to useful.RL at scale is a full-loop systems problem: training, rollout generation, environment execution, and reward computation running concurrently across thousands of GPUs, all needing to stay fa

Company & Role Analysis

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Likely perks

Private MedicalPension25+ Days HolidayStock OptionsLearning BudgetFlexible Hours

Culture & working style

Neutral 2–4 sentence summary of what working at this company is like, drawn from public reviews and press coverage. Tone, collaboration style, pace, benefits highlights.

Market salary range

£45,000 – £60,000 (Glassdoor, Levels.fyi, 2025)

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