Hardware Engineer/Integration Engineer for embedded systems (m/w/d)

Digitization and energy transition in one sentence? Yes, with Green Fusion!

With our software for optimized control of heating systems in the housing industry, we are counteracting climate change. By digitizing and automating control processes, we can not only reduce emissions but also energy consumption and thus actively drive the energy transition.

As a Hardware Engineer, you will validate IoT hardware solutions, ensuring top quality, usability, and cost efficiency. By collaborating with the software, network, backend, and DevOps teams, you will optimize hardware for better operations, data collection, and communication, supporting the reliability and performance of our products.

• Validate the best IoT hardware for our customers to ensure top quality, ease of use, and competitive pricing.


• Write unit, integration, and functional tests to maintain high code quality.


• Contribute to the co-design of our IoT hardware and research new technologies.


• Automate testing tasks to ensure the highest quality hardware and software.


• Collaborate with the software engineering team to optimize hardware for better operations, data collection, and communication.


• Work with network, backend, and DevOps engineers to maintain and optimize the communication system between our IoT devices and cloud infrastructure.

• Bachelor's or higher degree in electronics engineering, embedded systems, control engineering, communications engineering, robotics, or a related field.


• Over 4 years of development experience with IoT hardware systems such as sensing, cloud computing, etc.


• Strong experience with ARM-based hardware architectures, particularly under embedded Linux.


• Deep understanding of hardware components like sensors, microcontrollers, and communication modules.


• Extensive knowledge of hardware communication protocols (e.g., I2C, SPI, LTE-M, BLE, WiFi).


• Strong experience in hardware testing, validation, and the ability to identify root causes of issues.


• Debugging skills using tools like JTAG, GDB, logic analyzers, or simulators.


• Proficient in programming languages, preferably Python, LUA, and C for embedded systems.


• Detail-oriented with the ability to create comprehensive hardware documentation and report findings.


• Fluent in both written and spoken English and German.

🏠 Flexible working models with options for home office and up to 2 months of remote work.

💡 Diverse learning opportunities – whether through exciting challenges on the job, our open feedback culture, or supported training programs – there are always ways to grow and develop.

💼 Employee benefits like Urban Sports Club or Become1.

🌱 Direct impact through your work – actively contribute to the energy transition and fight climate change every single day.

💚 We value our team – that’s why regular team events are a big priority for us.

🙌 The best team Berlin has to offer – and maybe even beyond. Don’t believe it? See for yourself and apply now!

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While we are still considered pioneers today, with your help, we’ll soon dominate the market! First in the DACH region, then all across Europe.

You’ll join a motivated, open, and dynamic environment, driven by passion and ambition to actively shape the energy transition – because we can only succeed together!

We look forward to receiving your application – Fernanda will be in touch with you!