Senior AI Engineer: LLMs, RL & Agentic Systems

Company: Oliver Bernard
Apply for the Senior AI Engineer: LLMs, RL & Agentic Systems
Location: London
Job Description:

Oliver Bernard is partnering with a stealth-mode start-up in London at the forefront of AI research to hire a Senior AI Engineer. You will tackle challenging problems across LLMs, reinforcement learning, and agentic systems.

This hands-on role combines research and engineering: training and fine-tuning models, evaluating progress, building AI agents, and advancing core AI research while maintaining strong software practices in Python.

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Posted: August 28th, 2026