ML Engineer for Lumen Enterprise Models (London, Equity)

Cosine, based in London, is hiring a Machine Learning Engineer for Lumen Enterprise models (SWE-focused LLMs). The role is in-office in London with ASAP start. The engineer will train and improve models across pre-training, SFT and RL stages, profiling and optimizing performance while maintaining high software quality.

Equity options may be discussed. You will work with research, infrastructure and product teams to scale training, evaluate data and environments, and push the boundaries of

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