Your mission at Green Fusion

As a Hardware Test & Integration Engineer at Green Fusion, you will build and operate a structured and highly automated testing environment for our Green Boxes. You ensure that our hardware and software solutions work reliably before they reach our customers, and directly contribute to minimizing field failures and insuring delivery quality.

Your responsibilities:

• Build and operate a structured testing environment for the hardware and software of our Green Boxes (GB3 & GB4), including external controllers, wMBus/MBus meters, and additional components
• Execute prototype testing and support field testing activities
• Ensure firmware quality before deployment to devices in the field
• Develop scripts for test automation using C/C++


• Validate software images within the CI/CD environment prior to release
• Build, maintain, and continuously improve the hardware laboratory (in Berlin Kreuzberg), including inventory management, electrical safety, and occupational safety standards
• Create and maintain product and test documentation

Your profile

• Degree in Embedded Software Engineering, Electronics, Computer Engineering, or a related field
• Experience with embedded systems, low-level hardware development, or testing
• Experience with scripting for test automation, e.g. C/C++ or Python
• Good experience with ARM-based hardware architectures, especially under Linux
• Hands-on mindset with practical hardware experience
• Strong communication skills to collaborate with cross-functional teams and external partners
• Interest to independently establish workflows, identify and document issues and continuously improve systems
• Readiness to work from our hardware lab in Berlin Kreuzberg several times a week
• Fluent in English, German is a plus

Contact

We’re excited to receive your application via our application form! If you have any questions or technical issues, you can reach out to our Talent Acquisition Manager Mariia at careers@green-fusion.de.

About us

We are Green Fusion. We help the housing industry to make the heating and energy transition more sustainable – for a green future without compromise. By providing intelligent automation and optimization for a building's entire energy ecosystem, we reduce CO₂ emissions where it matters most. Whether it’s heat pumps, PV systems, or hybrid setups: our product serves as the interface between hardware and software, making maximum sustainability economically viable. Together, we are transforming the building sector and making efficient, climate-neutral energy the new standard.

While we are still considered pioneers today, with you by our side, we will soon dominate the market! Starting in the DACH region, and then across all of Europe. You can expect a motivated, open-minded, and vibrant team that is passionate about actively shaping the energy transition and growing together.

Our Employee Benefits:

• 
  Urban Sports Club or Become1 vouchers – a monthly bonus to support your lifestyle.
• Work flexibility & Home office – Work remotely from home, at our Berlin office at Schlesisches Tor, or up to 50 days a year worldwide.
• Personal growth & professional development – whether through your personal learning budget, exciting on-the-job challenges, or our open feedback culture.
• Direct impact through your work – join us in actively driving the energy transition and contribute to the fight against climate change every single day.
• We value our team – that’s why regular team events are a core part of our culture.
• The best team Berlin has to offer – and maybe even beyond. Don't believe us? Find out for yourself and apply now!