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Research Scientist — Physical AI & World Models

Job family
Member of Technical Staff
Team
Physical AI Research
Location
London / San Francisco
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About the role

Connect physics foundation models to robotics and world modeling, with a focus on learning physically consistent representations of dynamic systems.

What you will do

  • Research physics-informed world models for dynamic systems.
  • Model state transitions, forces, trajectories, and interactions.
  • Investigate how simulation-trained physics models improve robotic prediction and decisions.
  • Evaluate conservation laws, geometric constraints, and temporal consistency.
  • Build simulation-backed training and validation datasets.
  • Explore model-based planning and reinforcement learning where appropriate.
  • Collaborate on physical representations with geometric learning researchers.

What we’re looking for

  • Strong foundation in machine learning, robotics, dynamics, or control.
  • Experience with sequential, spatial, or dynamical learning.
  • Proficiency in Python and PyTorch or JAX.
  • Understanding of rigid-body dynamics, fluid dynamics, or simulation.
  • Ability to run independent research and rigorous validation.

Nice to have

  • MuJoCo, Isaac Sim, differentiable simulators, robotics benchmarks.
  • Model-based RL or world-model research.
  • Drones, autonomy, embodied AI, or relevant publications.

What success looks like

Demonstrate measurable gains in physical accuracy, generalization, or utility against high-fidelity simulation.

How to apply

Send your CV and a relevant paper, technical project, GitHub repository, or portfolio to careers@ratiolabs.ai. Suggested email subject: “World Models and Robotics”.

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