(Senior) Lab Engineer (mfd)

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 dont 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 3000 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.

Learn about our Product & Tech team!

At 1KOMMA5 we connect and manage distributed energy devices at scale. As a Lab Engineer you will build and configure test setups with integrated PV systems batteries heat pumps and EV chargers. Alongside maintaining and calibrating test equipment you will develop testing procedures for OEM component compatibility within the Heartbeat platform. Your role also involves providing 3rd-level support documenting procedures and results offering guidance to lower-level support teams and contributing to the improvement of testing methodologies at our Berlin lab.

Key responsibilities include but are not limited to:

• Planning and execution of development-related tests with hardware for an integrated energy control platform
• OEM and feature integrations: technical exploration with cross-functional teams; coordination and execution of system integration testing
• Release testing: test conception coordination and execution
• Design and construction of test benches; assemble and configure setups that simulate single-home environments (PV battery heat pump EV charger)
• Definition of test KPIs documentation and evaluation of results
• Develop and improve lab testing software test automation methodologies and procedures
• Guide junior lab engineers in daily tasks and support their technical and professional development through mentoring

The successful candidate will have:

• Completed studies in electrical engineering or mechatronics 4 years of experience in assembly testing or maintenance of electrical systems preferably in renewable energy
• Elektrofachkraft (EFK) qualification and proficiency reading electrical schematics and technical documentation
• Hands-on experience with multimeters oscilloscopes and power analyzers
• Experience collaborating with development support teams and stakeholders to troubleshoot technical issues
• Valid drivers license Class B
• Strong documentation skills with the ability to record and communicate test procedures results and best practices
• Fluency in English and German both written and verbal

Bonus points for:

• Familiar with state of the art AI development using Tools like Claude Code Cursor and other development tools

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
• Benefits and discounts are yours with Futurebens
• Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time