Computational physicist

Join to apply for the Computational physicist role at Proxima Fusion

At Proxima Fusion, we’re driven by a bold mission – to redefine the future of sustainable energy. Our unique concept, built upon the groundbreaking W7‑X stellarator and the latest advances in technology, paves the way for commercially viable fusion power plants. Our work in stellarator optimization, powered by cutting‑edge computation and machine learning, propels us into uncharted territories of fusion technology.

• You will get to work on some of the most complex tech challenges to bring abundant, safe, clean energy to the world.
• You’ll get to join and learn from an exceptional selection of accomplished and driven individuals.
• Do your life’s best work and enjoy the journey.
• Show that big things are possible in Europe by assembling the best talent.

As a computational physicist you will play a central role in developing and applying state‑of‑the‑art numerical models that characterise the behaviour of fusion plasmas. This hands‑on technical role involves designing, implementing, and validating simulation tools and numerical methods to answer research questions at the frontier of plasma physics. The production‑quality tools you build will inform critical design and physics decisions for future fusion power plants.

• Design, implement, and extend workflows that characterise plasma performance.
• Write high‑performance scientific code for lightweight integrated models and high‑fidelity HPC simulations.
• Apply modern development tools and workflows, including LLM‑based assistants, to improve development velocity, code readability, and testing coverage.
• Communicate results and collaborate with integrated modellers and engineers to ensure stellarator designs meet the requirements for effective plasma confinement and control.
• Validate and benchmark models against theory and experimental data where relevant.

• Hold a PhD or Masters in physics, mathematics, or computational physics.
• Proven experience building numerical tools from first principles, taking problems from governing equations through numerical formulation, implementation, and validated simulation results.
• Proficient in one or more of Python, Julia, C++, or Fortran.
• Comfortable using LLM‑based development tools as part of a modern scientific software workflow, with a clear understanding of their limitations and failure modes.
• Proficient in modern software development workflows and HPC.
• Proactive in framing problems and proposing and interrogating solutions.
• Motivated to work with and cultivate a diverse team of physicists, numerical modellers, and engineers.

• Recruiter Interview (30–60 min)
• Technical Screening (30 min)
• Technical Panel (three 60‑minute sessions)
• CEO call (30 min)

At Proxima Fusion, our mission is bold: making limitless clean energy a reality. We need a high‑performing, diverse team that brings different perspectives, challenges assumptions, and builds together with purpose. We don’t look at how you identify, what you look like, who you choose to worship or your ethnicity; we care about what you can bring to the table.

Seniority Level: Mid‑Senior level

Employment Type: Full‑time

Job Function: Research, Analyst, and Information Technology

Industry: Electric Power Generation