Senior Accountant

WHO WE ARE 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. What’s more, our work in stellarator optimization, powered by cutting-edge computation and machine learning, is propelling us into uncharted territories of fusion technology. New higher performance design points are unlocked by high temperature superconducting magnets. To fully grasp this huge opportunity, we’re building a team of extremely dedicated and passionate people who come together driving something extraordinary, radically transforming technology in the world. 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 You will own and scale Proxima Fusion’s accounting function, ensuring fast, accurate, and compliant financial reporting in a high-growth environment. With strong IFRS and HGB expertise, you’ll drive reliable month-end closings, tax readiness, and audit execution—providing the financial foundation our team needs to make confident decisions. WHAT YOU WILL DO - Take full ownership of monthly, quarterly, and annual closings, ensuring high quality and on-time delivery. - Prepare and review individual and consolidated financial statements under IFRS and HGB. - Maintain accurate general ledger accounting, including accruals, provisions, and reconciliations. - Lead and resolve complex accounting topics; act as the internal expert for IFRS and HGB and intragroup questions. - Ensure compliance with statutory, tax, and regulatory requirements. - Collaborate closely with founders, finance leadership, and controlling to connect accounting outputs to broader financial planning and decision-making. - Serve as the primary contact for auditors, tax advisors, and external service providers; coordinate audit and tax processes end-to-end. - Provide clear, reliable financial insights to support decision-making in a startup context. - Operate day-to-day using DUO and DATEV REWE, ensuring clean processes and data consistency. WHO YOU ARE - Degree in Accounting, Finance, Business Administration, or a related field. - 5+ years of relevant accounting experience, ideally in a startup, scale-up, or high-growth environment. - Proven hands-on experience preparing IFRS and HGB financial statements (individual and ideally consolidated) - Strong knowledge of German accounting, tax, and regulatory requirements. - Practical experience with DUO and DATEV REWE (must-have) - Comfortable taking end-to-end ownership and working hands-on while improving processes as you go. - Experience working with a team and collaborating across functions. - Detail-oriented, dependable under deadlines, and pragmatic in ambiguous, fast-moving environments. INTERVIEW PROCESS - Recruiter Interview (30-60 min) - Technical Screening (30 min) - Technical Panel (3x60 min) - CEO call (30 min) 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.