Robotics Simulation Engineer: Stable, Scalable Physics

Allen Institute for Artificial Intelligence; Seattle (WA); On-site; USD 129,000 - 193,000; Full time

Benefits offered by this job

Medical/dental/vision insurance

401(k) plan

Commuting/internet stipend $125/month

Fitness and wellbeing stipend $200/月

Generous paid time off and holidays

Job summary

Ai2’s Robotics team is seeking a Simulation Engineer to develop scalable, robust physics for robotic systems and trainable simulations. You will design and improve solvers, calibrate models against hardware data, and ensure stability and realism across multiple simulators (MuJoCo, Isaac Sim/Lab).

Office-based in Seattle with on-site expectations. You will work with MuJoCo, Isaac Sim/Isaac Lab on Newton, and other GPU simulators, aligning research with production needs and providing a foundation

Qualifications

• PhD in robotics, mechanical engineering, applied mathematics, physics, computer graphics or a related field, or a Masters + 3 years of experience.
• Demonstrated depth in rigid-body dynamics and constrained multibody systems: articulations, contact and friction modelling, and numerical integration of stiff systems.
• Solver or physics-engine code you wrote yourself, in a research codebase, a production engine, or a widely used open-source simulator such as MuJoCo, Newton/Warp, PhysX, Drake, Bullet or Genesis.
• A track record of diagnosing and fixing simulation instability (jitter, penetration, energy drift, divergence), with an understanding of why the fix works.
• Experience fitting simulation parameters to measured data and validating the result quantitatively against real-world recordings.
• Proficiency in Python and C++, experience with robot description formats (URDF, MJCF, OpenUSD), and knowledge of at least one major simulation stack at source level.

Skills

Simulation engineering

Robotics

Python

C++

Education

PhD in robotics or related field

Masters + 3 years experience

Bachelor’s degree + 3+ years experience

Tools

MuJoCo

Isaac Sim

Isaac Lab

URDF

MJCF

OpenUSD

PhysX

Drake

Job description

Ai2’s Robotics team is seeking a Simulation Engineer to develop scalable, robust physics for robotic systems and trainable simulations. You will design and improve solvers, calibrate models against hardware data, and ensure stability and realism across multiple simulators (MuJoCo, Isaac Sim/Lab).

Office-based in Seattle with on-site expectations. You will work with MuJoCo, Isaac Sim/Isaac Lab on Newton, and other GPU simulators, aligning research with production needs and providing a foundation