Software Engineer (f/m/d)

About Focused Energy Focused Energy is building the future of clean energy through laser-driven inertial fusion. Backed by our $240M Series A — the largest fully secured Series A in the global fusion industry — we are scaling rapidly across multiple geographies. Based in Germany and the US, we have brought together the top scientific and engineering minds using proven technologies to unlock fusion power at commercial scale. Focused Energy is working to realize game-changing scientific innovation that promises to deliver a clean, sustainable and abundant source of power globally. Your Role Focused Energy’s Software Department builds the internal applications, data workflows, system integrations and automation that help our scientists, finance, legal, people and executive teams work faster and more reliably. As a Software Engineer in our forward deployed model, you will join projects where Focused Energy has an important technical or operational need, understand the context, build and deliver a reliable solution, complete a clean handover, and then move on to the next priority. You will quickly learn several project domains across fusion systems, finance, legal and executive work, and you will own moderately complex features from design to deployment. You will be a go-to engineer for turning cross-functional needs into maintainable software, raising the standard for internal tools, and helping us reuse shared platforms and patterns. You will see your work directly shape how fusion research and company operations run. You will gain broad exposure to scientific, hardware, operational and business problems, and you will take ownership from day one. What You'll Do • Own moderately complex, well-scoped features from technical design through testing, deployment and handover. • Work directly with scientists, the people team, legal, operations, IT and other specialists to understand their goals and turn them into practical software. • Build internal applications, data workflows, system integrations, APIs, automation and engineering tools based on each project’s needs. • Add automated tests, logging, metrics, error handling and basic operational guidance to the software you deliver. • Move between projects after delivering agreed outcomes, leaving software tested, documented, maintainable and ready for its long-term owner. • Improve code quality, remove small areas of technical debt, contribute to code reviews, and reuse shared platforms and patterns where they fit. • Learn several project domains quickly, deliver your first end-to-end features, and establish a reliable routine for testing, documentation and handover. • Take on broader and less clearly defined projects, help standardize how internal software is built, secured and operated, and become a trusted partner for teams across the company. Who You Are • You can independently own well-scoped work, with support available for broader architecture or highly unclear decisions. • Strong software engineering fundamentals, including readable code, data structures, debugging, automated testing, version control and code review, with evidence of delivered working software. • Ability to build and maintain software in a modern typed language such as TypeScript or JavaScript. Strong experience with a similar language is also relevant. • Experience building web applications with a component-based frontend framework such as React, Vue or Angular. • Understanding of relational databases and SQL, including schemas, migrations, permissions and data modeling. • Experience integrating software through REST APIs, events, scheduled jobs or similar communication patterns. • Understanding of authentication, authorization, role-based access and secure data handling. • Familiarity with CI/CD,