RL Systems Architect — Scale Post-Training for LLMs

Luma is seeking an expert to design, build, and scale distributed RL post-training systems for large-scale LLMs. You will orchestrate trainer, rollout, environment, and reward workloads across thousands of GPUs, with high-throughput rollout generation and asynchronous weight synchronization.

You will develop RL environments, reward infrastructure, and verifiers, plus evaluation tooling to keep runs stable. This role emphasizes scaling efficiency and rapid productionization with researchers.