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# Simulation Engineer, Computational Physics

- **Company:** Proxima Fusion
- **Location:** München, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Continuous Integration, Software Tools, Pytorch, Hardware Testing, Git
- **Published:** September 19, 2026
- **Apply:** https://startup.jobs/senior-simulation-engineer-computational-physics-proxima-fusion-9893854

## About the Role

* Your knowledge ranges across physics, geometry, and numerical methods. You feel comfortable jumping into the complex 3D geometry of a stellarator and the many physics phenomena happening in a stellarator.
 * You have technical qualifications and experience. You hold a PhD or Master's in physics, engineering, or an adjacent field, and you have built simulation tools encompassing numerical algorithms, geometry, and physics.
 * You build in code like a software engineer. You are familiar with git, CI/CD, the PyData stack, autodifferentiation packages (like JAX or PyTorch), and you have built real tools, not just scripts.
 * You choose tools appropriately. Given a simulation need, you reach for the most appropriate tool, being a simple simulator or a commercial multiphysics package.
 * You're proactive. You find the gap before it becomes a problem, prioritize effectively, and argue for the next step.

INTERVIEW PROCESS

 * Recruiter Interview (30-60 min)
 * Technical Screening (30 min)
 * Technical Panel (3x60 min)

## Description

* Identify and implement the simulators. Depending on the simulation needs, you will implement a simulator from scratch or wrap an existing tool into our platform, and make sure the model is properly interfaced with our codebase.
 * Co-define the input and output interfaces. Work together with the engineering teams to update the data model for input and output to ensure it captures correctly the relevant design specifications.
 * Ensure correctness. Ensure simulation pipelines are tested, verified, validated and work correctly as the design evolves. Where needed, help scoping and contribute to validation in hardware tests.
 * Exercise the models. Support the integrated design team with dedicated studies to inform design tradeoffs.
 * Expose simulators as a service to humans and agents. Create dashboard, online tools, and interactive reports to visualize model prediction and uncertainties and explore the model behaviour, that can be easily used by the entire Alpha design team.


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