Member of Technical Staff, RL Infrastructure

Threeum

Threeum is a frontier company building physical AI. We design the model and the machine as one system, so the full loop of training, deployment, and improvement runs faster, more capable, and more autonomous. Our goal is to make frontier AI physical, and to make it widely accessible.

The Role

We are looking for an engineer to build the systems that let RL run at scale: rollouts, replay, distribution, and the plumbing between learners and the machines they learn on.

Some example areas you might work on (not limited to):

• Build high-throughput rollout and replay infrastructure across simulated and physical actors
• Make experiments reproducible, resumable, and cheap to launch
• Profile and remove the bottlenecks between environment steps and gradient steps

If you want to build the machines the models deserve, we would love to hear from you.

We offer a base salary of $250,000 to $400,000 USD and a meaningful equity grant, depending on experience and background, along with competitive benefits.