Senior ML Research Engineer – Generative AI & LLMs (Hybrid)

Company: Principle HR
Apply for the Senior ML Research Engineer – Generative AI & LLMs (Hybrid)
Location: London
Job Description:

Principle HR in London is seeking a Senior Research Engineer to join a world-leading technology organisation, focusing on AI and machine learning research. You’ll be embedded in a cutting-edge team working on LLMs, RL, synthetic data, and multi-agent systems.

This unusually research-heavy engineering role involves building robust infrastructure to support experiments and deploying production-quality code at scale.

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Posted: September 13th, 2026