Principal Software Engineer (f/m/d)
Focused Is this your company? Claim it · Darmstadt, DE · Full-time
Description
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 is looking for a Principal Software Engineer to define and own the Core Software architecture that will operate and integrate our fusion power plant. Sitting within the Software Department and reporting to the Head of Software, this is a foundational technical role: you will set the direction for how controls, hardware interfaces, calibration systems, data infrastructure, and human-machine interfaces come together into one coherent system. You will design and implement critical parts of the Core Software stack, stand up reliable automated calibration workflows, and set the engineering standards the rest…
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Questions about this job
Where is this Principal Software Engineer (f/m/d) job located?
The listing places this job in Darmstadt, DE.
Who is hiring?
The employer shown on the listing is Focused.
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The listing type is Full-time.
When was this job posted?
It was posted on 13 November 2026. Jobs that stay open too long are closed automatically, so apply soon if you are interested.
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