At 1KOMMA5°, we pursue a clear vision: Living on wind and sunlight forever for free. To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?
We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and particularly cost-effective. By 2030, our goal is to transition 1.5 million households to renewable energies. Over 2,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia.
Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow.
Become a part of our mission and learn more about our Product & Tech team!
At 1KOMMA5°, we connect and manage distributed energy devices at scale. As a (Senior) Embedded Linux Engineer, you will play a key role in developing and operating the 1K5 Heartbeat Gateway, the edge device that securely connects thousands of energy assets to our cloud ecosystem.
You will work primarily on the embedded Linux platform running on our gateway hardware, collaborating closely with hardware engineering to ensure that the system is robust, secure, and ready for large-scale manufacturing and field deployment.
Your work will directly contribute to the reliability, security, and long-term maintainability of the distributed energy infrastructure powering the energy transition.
Key responsibilities include but are not limited to:
Develop and maintain the embedded Linux distribution for our gateway using Yocto
Design and maintain the boot chain and secure boot architecture, ensuring trusted firmware execution and reliable device startup.
Develop and maintain device tree configurations, drivers, and hardware interfaces
Work closely with hardware engineers on board bring-up, hardware validation, and debugging, ensuring smooth integration between hardware and the Linux platform.
Implement and maintain OTA update infrastructure using Mender, ensuring safe updates, rollback mechanisms, and long-term maintainability of devices in the field.
Design and maintain the assembly-line flashing and provisioning system, including automated workflows to flash firmware, provision device identities, and run factory diagnostics during manufacturing.
Troubleshoot and resolve system-level issues across hardware, kernel, and operating system layers, ensuring robustness, recoverability, and stability of gateway fleets deployed at scale.
Technologies you will work with include:
Yocto, Linux kernel, device trees, bootloaders, secure boot
DevOps: CI/CD pipelines, secure OTA processes, Mender
Embedded hardware (e.g. SoCs, compute modules, secure elements)
Manufacturing processes: prototyping, assembly, flashing, and testing
The successful candidate will have:
Bachelor’s or Master’s degree in Computer Science, Electrical/Electronics Engineering, or a related field.
5+ years of experience developing embedded Linux systems.
Strong experience with Yocto or other embedded Linux build systems.
Solid understanding of Linux system internals (boot process, kernel configuration, device drivers).
Experience with board bring-up and hardware debugging.
Experience working with bootloaders, secure boot, or trusted device architectures.
Hands-on experience designing or maintaining assembly-line flashing or device provisioning systems.
Experience working closely with hardware engineers on custom embedded platforms.
Ability to debug problems across hardware, kernel, and operating system layers.
Strong troubleshooting and analytical mindset.
Clear and effective communicator in English (German is a plus).
Bonus points for:
Experience developing edge services in Go.
Experience with MQTT or device-to-cloud communication systems.
Familiarity with Eclipse Hono or similar IoT solutions.
Familiarity with Google Cloud Platform.
Passion for climate tech and distributed energy systems.
We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to provide everyone with renewable energy technologies.
You are part of a dynamic team with people who prove every day that they can make things happen and move companies forward with great positive impact
You move in flat hierarchies and have short decision-making paths. You can learn a lot quickly and get involved at different levels
You will be welcomed by a friendly and familiar team
You are part of the energy transition and recognize in your daily work what purpose it serves
You can work in one of our offices in Hamburg, Berlin or Munich
You create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass
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Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time
"At 1KOMMA5°, our vision is to accelerate CO2 neutral life for all! We created an easy one-stop-shop to buy and install solar, charging stations and heat pumps, with the purpose of liberating all European homes from the shackles of fossil fuels. With Heartbeat, we make clean energy smarter. Connecting our customers into one powerful clean energy operating system to enable flexible tariffs and to ultimately follow the rhythm of wind and sun!" - Philipp Schröder (CEO 1KOMMA5°)
