ML Infrastructure Engineer - RL & Post-Training Systems

White Circle in Paris is seeking an ML Infrastructure Engineer to build the systems behind post-training, RL, evaluation, inference, and agentic development workflows. You will work closely with researchers, GPUs, training loops, data control systems, and eval stacks to influence model learning and product quality.

You will design scalable pipelines, optimize performance, and ensure robust data flow from rollout to evaluation, collaborating across teams to ship reliable infrastructure.