About the role

We’re looking for researchers and engineers who love training the best AI models. You’ll work on the full training stack, from data and recipes to post-training, RL, and evaluation, alongside a small, high-caliber team building at the frontier of AI systems.

What you might work on

• Pre-training, mid-training, and post-training of large models

• Reinforcement learning, reasoning, and reward modeling

• Data, evaluation, and the research behind making models measurably better

You might be a fit if you

• Have a track record of research or engineering on large-model training

• Care about shipping results, not just publishing them

• Are curious, direct, and comfortable with ambiguity