Numerical Modelling Engineer

Numerical Modelling Engineer About Us We are a fusion energy startup based in London. We are a combination of physics, engineering, materials science and computer science talent. We are a high-calibre team intentionally maintaining a low profile; we prioritise performance over the performative. You will have real ownership from day one of problems, decisions, and outcomes - alongside meaningful equity. In return, we hope to see driven and rigorous work. Our colleagues keep a critical eye on all decisions, want to support one another and can adapt to working on new tasks as the need arises. We invite applications from a diverse range of backgrounds to give a range of perspectives as we race towards bringing innovative, complex engineering solutions to market. This environment is designed for people who want to do extraordinary work with the potential for extraordinary impact. Summary We are seeking a Numerical Modeling Engineer to advance the design and performance of our electromagnetic systems through high-fidelity, physics-based simulations. You will develop robust numerical frameworks that combine commercial multiphysics tools with internally developed models, enabling fast and reliable engineering decisions. Your work willfocus on modeling electromagnetic, thermal, and transient multiphysics behavior to drive design optimization for conductors, coils, and protection systems. Key Responsibilities You will develop predictive models across steady-state and transient regimes. ● Electromagnetic Simulation: Analyze magnet systems to evaluate current distribution, inductance, AC losses, and nonlinear magnetic properties. ● Thermal Modeling: Simulate heat generation, conduction, and cryogenic cooling performance under realistic operational conditions. ● Multiphysics Build and validate coupled FE models to capture transient effects such as current redistribution and localized heating. ● Instability Modeling: Implement and validate numerical frameworks to simulate quench initiation, propagation, and protection strategies. ● Collaborate with design teams to validate models and integrate insights into system development Qualifications & Skill ● Degree (MSc or PhD) in Mechanical Engineering, Applied Physics, Computational Engineering, or a related field. ● Proven experience in multiphysics and transient simulation, particularly electromagnetic–thermal coupling. ● Proficiency in at least one scientific programming language (Python, MATLAB, C++, or similar), with interest in developing internal modeling tools and workflows. ● Hands-on experience with electromagnetic FEM modeling using COMSOL or equivalent commercial multiphysics platforms. ● Experience in thermal modeling and heat transfer in complex systems. ● Excellent analytical skills and physical intuition, with the ability to connect simulation outcomes to system-level design and performance