ML Research Engineer – Scale LLMs & AI Safety, Equity

Company: Moonfire
Apply for the ML Research Engineer – Scale LLMs & AI Safety, Equity
Location: London
Job Description:

White Circle is seeking several ML Engineers to train, post-train, and evaluate the LLMs powering our platform. This hands-on role involves building petabyte-scale data pipelines, SFT/RLHF/DPO-style alignment, reward models, and distributed multi-GPU training.

You’ll translate insights into product decisions and create self-serve analytics for the team. The team focuses on safety, reliability, and optimization of AI systems, with opportunities to influence how safety policies are implemented at

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Posted: October 6th, 2026