Physics Simulation Engineer (Robotics)

Location: Paris, France; hybrid

Company

hirify.global develops Genesis-World, an open-source general-purpose simulation platform for physical AI and robotics.

What you will do

• Develop production-ready physics simulation capabilities used by internal robot-learning pipelines.
• Advance simulation speed through adaptive timesteps, selective fidelity, and structure-aware solvers.
• Expand multi-physics coverage across deformable bodies, fluids, particles, tendons, and other physical systems.
• Improve physical fidelity for contact, friction, deformation, energy, actuation, and material models.
• Build scalable coupled solvers for heterogeneous environments and massively batched GPU simulation.
• Implement, test, document, and validate research-driven methods through analytical solutions, other engines, and real-world data.

Requirements

• Strong background in physics-based simulation, preferably in robotics, including RBD, FEM, MPM, SPH, IPC, XPBD, VBD, or ABD.
• Knowledge of constrained optimization and numerical integration of stiff systems.
• Experience shipping simulation code used by others in an engine, industry, or research codebase.
• Solid CPU and/or GPU HPC programming skills and practical understanding of numerical performance.
• Rigor in analytical, cross-engine, and real-world validation.
• Ability to work in a hybrid role based in Paris.

Nice to have

• Publications in simulation, graphics, or robotics venues such as SIGGRAPH, ICRA, IROS, CoRL, or RSS.
• Contributions to an open-source physics engine.

Culture & Benefits

• Work on an open-source platform targeting physical AI and scalable robotics.
• Research is applied end-to-end, from algorithms to merged, tested, and documented production code.
• Occasional opportunities for groundbreaking research through academic collaborations.
• Python-first development with execution across CUDA, AMD ROCm, Apple Metal, Vulkan, x86, and ARM64 backends.