Lumen Labs
Simulation/RL Integration Engineer | REMOTE (US/Canada), then ONSITE SF from fall 2026
hn · REMOTE (US/Canada), then ONSITE SF from fall 2026 · $130k–200k
Jose has exceptional full-stack and Python engineering chops with proven ability to ship complex systems end-to-end, and his ML/AI background from a recent masters in deep learning is relevant. However, he lacks the specific robotics simulation experience (Gymnasium, Isaac, MuJoCo, Gazebo) that the role explicitly requires, and his track record is in LLM agents, voice platforms, and analytics rather than RL or physics simulations. The founding engineer mindset fits the early-stage team, but the domain gap is substantial.
Hook: Your founding engineer experience shipping complex AI systems end-to-end and deep learning background could translate to robotics infrastructure, though you'd need to quickly ramp on simulation frameworks the role depends on.
Missing: Gymnasium and vector API experience, hands-on Isaac/MuJoCo/Gazebo simulation work, reinforcement learning deployment in physics simulators, robotics or physical AI domain knowledge
Posting
Lumen Labs | Simulation/RL Integration Engineer | REMOTE (US/Canada), then ONSITE SF from fall 2026 | $130k–200k + early equity | Visa OK Lumen (https://lumenresearch.ai) is building the cognitive layer for physical AI. Most robotics efforts today learn from thousands of hours of human teleoperation; we think that has a ceiling. White paper: http://lumenresearch.co/paper Team of two ex-founders — you'd be #3. Pre-seed, runway well into 2027, raising a seed later this year. We test many model architectures against many sims, and hooking them together is our biggest pain point. We use Gymnasium and Shimmy as the plumbing and upstream useful pieces as open-source contributions. You'd build per-sim adapters to a shared interface contract, bridge single-env vs. GPU-vectorized and sync vs. async paradigms, and own our eval harness. Looking for: strong Python, Gymnasium (especially the vector API), hands-on experience with Isaac, MuJoCo, or Gazebo, and a track record of getting models running in sims where they didn't before. Email hi@lumenresearch.co about you and your projects — link one where you got a model working in a sim it wasn't built for and you'll jump the pile. Full posting: https://desert-bearskin-26d.notion.site/Simulation-Engineer-Lumen-399e2e6bfecb80a69dd3fc78b7e8dfbb?source=copy_link