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Senior AI Research Engineer: LLMs, RL & Agents

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Oliver Bernard
Full Time position
Listed on 2026-08-24
Job specializations:
  • Software Development
    AI Engineer (Applied/Software), Machine Learning/ ML Engineer, AI Reliability/ Performance Engineer
Salary/Wage Range or Industry Benchmark: 120000 - 150000 GBP Yearly GBP 120000.00 150000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Oliver Bernard partners with a stealth-mode AI start-up in London, seeking a Senior AI Engineer. You’ll join a team working on cutting-edge research across LLMs, reinforcement learning and agentic systems, blending rigorous research with strong software engineering.

The role focuses on building AI agents, developing feedback loops, and conducting AI research, applying expertise in LLM training, RL, post-training or evaluation to tackle ambitious problems.

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Position Requirements
10+ Years work experience
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