Menlo Research is an Applied R&D; lab building Asimov, an open-source humanoid robot platform, and the full software stack that powers it. Our mission is to make humanoid labor economically viable – turning software into physical labor at scale. We build across the full stack: hardware architecture, locomotion, autonomy, simulation, and infrastructure. We move fast, ship to real robots, and open-source everything we can. If you want your work to matter beyond a paper or a demo, this is the place.
The Role
The hard problem in simulation is not building a demo environment. It is building digital twins that are faithful enough to train policies, close sim-to-real gaps, and accelerate hardware development at scale. As a Software Engineer, Digital Twin, you will own the environments, tooling, and pipelines that make Asimov’s virtual counterpart a first-class engineering asset. You will work across MuJoCo, Isaac Sim, and Unreal Engine – using the right tool for the right layer of the stack, from physics training to photorealistic synthetic data generation.
What You Will Do




- Build and maintain high-fidelity digital twin environments for Asimov across MuJoCo, Isaac Sim, and Unreal Engine, calibrated to real hardware behavior.
- Design and own the systems – not just the environments – that let locomotion, autonomy, and perception teams generate, validate, and iterate on simulation scenarios at scale.
- Build pipelines for asset import, USD and MJCF workflows, sensor modeling, and real-to-sim calibration to keep digital twins synchronized with evolving hardware.
- Develop photorealistic rendering pipelines in Unreal Engine for synthetic data generation and perception model training.
- Work with hardware and mechatronics teams to model actuator dynamics, contact physics, and structural behavior, ensuring simulation parameters reflect physical ground truth.
- Integrate digital twin environments with Menlo’s locomotion training pipeline (Cyclotron) and autonomy stack, enabling t

📌 Demo (San Francisco)
🏢 Walkthrough.ai
📍 San Francisco