Research Engineer, Pretraining Scaling (London) - Flexible Hours

Anthropic in London is seeking a Research Engineer focused on Pretraining Scaling to help production pretrained models train reliably, efficiently, and at scale. You will work across the full training stack, optimize performance, and debug issues that arise during launches.

Join a collaborative team spanning SF and London, contributing to experimental design, instrumentation, and operational excellence while shaping the efficiency of large-scale ML systems for safe, beneficial AI.