Senior Software Engineer (Dev Platform)

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. WHY JOIN PROXIMA FUSION - 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. - Get to show that big things are possible in Europe when you assemble the best talent. YOUR IMPACT - Build and scale the software infrastructure that enables exploration of the vast hyper-dimensional space of stellarator design - Develop the core data, compute, and analysis tooling used by teams across the company - Collaborate directly with fusion experts, engineers, and AI researchers to turn their workflows into robust infrastructure - Shape how software is developed at Proxima - practices, quality standards, and architecture WHAT YOU WILL DO - Design and develop a platform that helps simulation, optimization and stellarator design teams to overcome their challenges and achieve their goals more efficiently. - Champion the Cloud Infrastructure Operations. - Manage general cloud infrastructure (including IaaC, permission management, and cloud efficiency). - Support the democratization of cloud computing (e.g. K8s, Ray, Dask, Docker, PEX). - Unify and streamline the development experience (including CI/CD, Devcontainers, and monorepos). - Improving observability. - Manage Distributed Computing and High-Performance Computing clusters for research, stellarator design and optimization. - Raise the bar in our cross-org DevOps practices and optimize our DORA metrics. WHO YOU ARE - We’re seeking a software engineer with a strong foundation in computer science and an understanding or hands-on experience with DevOps, CloudOps, or Platform engineering practices. - Familiar with the development and management of scalable cloud infrastructure, ideally as used in science, ML or other data processing-heavy use cases. - Experienced in end-to-end/full-stack system design, ideally within an environment supporting physics, engineering, or AI teams. - Proficient in Python and Linux. - Driven to solve complex problems with simple solutions and a desire to contribute to clean energy. INTERVIEW PROCESS - Recruiter Interview (30-60 min) - Technical Screening (30 min) - Technical Panel (3x60 min) - CEO call (30 min) *This role sits at "L3" of our framework, please inquire during the recruitment process for further information. At Proxima Fusion, our mission is bold: making limitless clean energy a reality. To get there, we need a high-performing, diverse team that brings different perspectives, challenges assumptions, and builds together with purpose. We know that diversity of thought and experience leads to better ideas, stronger execution, and a more resilient team. We don’t look at how you identify, what you look like, who you choose to worship or what ethnicity you are. We care about what you can bring to the table.