Numerical Modeling Engineer

WHO WE ARE

Proxima Fusion is Europe’s fastest-growing fusion company and the continent’s best-funded fusion player, as well as the first spin-out from the Max Planck Institute for Plasma Physics (IPP). Backed by over €650M and powered by a growing team across Munich, Zurich, and Oxford, we are developing the hardware and infrastructure needed to deliver the world’s first commercial stellarator fusion power plant.

Our concept advances the most mature fusion technology out there, the Wendelstein 7-X stellarator, through two next-generation machines:
Alpha and Stellaris. Our work combines stellarator optimization, advanced computation, machine learning, and high-temperature superconducting magnets to unlock higher-performance designs that were previously out of reach.

Turning these designs into a functioning fusion power plant requires excellence and ownership across every discipline, from physics and engineering to software, manufacturing, law, and business functions.

TEAM AND ROLE

• Architect a breakthrough energy technology – Play a defining role in designing and integrating the systems that will power the world’s first commercial stellarator fusion plant, influencing decisions that shape the future of clean energy.

• Solve some of the most complex engineering challenges in fusion – Work across magnet design, HTS technology, manufacturing, structural integration, and controls, turning cutting-edge science into real hardware

• Move fast and build what matters – Join a highly ambitious, multidisciplinary team that combines cutting-edge simulation with hands‑on engineering, turning bold ideas into real hardware on the path to commercial fusion.

WHY JOIN PROXIMA FUSION

Impact: Your simulations will directly shape the magnets that enable commercial fusion energy.

Ownership: As part of a small, highly technical team, you will define modeling standards and influence core design decisions.

Frontier Engineering: Work at the intersection of high-field electromagnetics, cryogenics, and advanced numerical methods.

Collaboration: Join a team combining deep superconducting expertise with advanced computational capability to solve one of the hardest engineering challenges of our time.

YOUR IMPACT

At Proxima Fusion, we are designing the first generation of fusion power plants to provide the world with clean, carbon‑free energy. The heart of our reactor lies in its superconducting coils. These magnets operate at cryogenic temperatures, generate extreme magnetic fields, and must remain stable under complex electromagnetic and thermal transients.

We are looking for a Numerical Modeling Engineer to develop high-fidelity simulation tools that predict and de‑risk the behavior of our superconducting magnets. Your work will span electromagnetic, thermal, and transient multiphysics modeling - including quench dynamics - and will directly inform design decisions for conductors, coils, and protection systems.

This role is not about running black-box simulations. It is about building robust numerical frameworks - combining commercial multiphysics tools with in-house developed models - to enable fast, reliable, physics-driven engineering decisions.

WHAT YOU WILL DO

Your work will combine physics modeling, numerical implementation, and close collaboration with magnet designers and experimental teams. You will contribute across three primary domains:

You will develop predictive models of superconducting magnet behavior across steady-state and transient regimes.

• Electromagnetic Simulation: Model high-field magnet systems including current distribution, inductance, AC losses, and nonlinear material behavior.

• Thermal Modeling: Simulate heat generation, conduction, and cryogenic cooling performance under operational and fault conditions.

• Multiphysics Coupling: Develop coupled EM-thermal models to capture transient events such as current redistribution and localized heating.

• Quench Modeling: Implement and validate numerical frameworks to simulate quench initiation, propagation, and protection strategies.

• Model Validation: Correlate simulations with experimental data from conductor and coil tests to…