Prototype Engineer

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.

As a Prototype Engineer at Focused Energy, you’ll play a hands-on role in the integration and testing of the hardware that supports our laser-driven fusion technology. Based onsite in Austin, you’ll work alongside scientists and senior engineers in our Target Tracking & Engagement lab, helping turn test plans into successful experiments.

You’ll gain practical experience working with sensitive optics, laser systems, test rigs, and advanced hardware while contributing directly to fast-moving development and test campaigns. This is an opportunity to build your technical expertise in a highly collaborative environment where your work helps keep experiments moving.

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  Execute integration and qualification tests according to approved test plans and operating procedures.

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  Maintain and prepare test rigs, lab hardware, software, and configurations for upcoming campaigns.

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  Perform precision alignment and safe operation of optics and laser systems.

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  Support the build, teardown, troubleshooting, and upgrades of test rigs alongside senior engineers.

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  Work with scientists to translate test procedures into executable sequences during test campaigns.

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  Document test results, issues, and observations clearly so senior engineers and scientists can quickly diagnose and address problems.

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  Provide hands-on technical support across the engineering team as needed.

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  Follow established safety practices and proactively flag potential hazards or gaps.

• A degree and/or hands-on technical background in engineering, physics, optics, or a related field.

• A strong interest in experimental hardware, test and integration, and hands-on engineering.

• Familiarity with basic optics and laser alignment, test equipment, or hardware/software diagnostics.

• A methodical approach to executing technical procedures while remaining adaptable when experiments don't go exactly as planned.

• Strong attention to detail, particularly when working with sensitive equipment and precision systems.

• Clear communication skills and the ability to work closely with scientists and engineers.

• A safety-first mindset and willingness to work hands-on in a laboratory environment.

• Curiosity, initiative, and a desire to grow toward greater ownership of troubleshooting and system integration.