[Remote] (Senior) IoT Hardware Engineer (m/f/d)

Note: The job is a remote job and is open to candidates in USA. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation, and services related to solar, heat pumps, electricity, and charging infrastructure. As an IoT Hardware Engineer, you will be responsible for the hardware architecture of the 1K5 Heartbeat Gateway, ensuring its reliability, scalability, and compliance while coordinating with various teams. Responsibilities • Own the hardware architecture of our IoT gateway, from concept and component selection through production and lifecycle management • Work closely together with the product manager to define system-level requirements covering performance, reliability, security, manufacturability, and cost • Act as the main interface between hardware, embedded software, and manufacturing, ensuring tight alignment across disciplines • Oversee board-level validation, debugging, and failure analysis during prototyping, pilot runs, and field operation • Define and support hardware test strategies for production, including manufacturing flashing processes • Drive hardware-related certification activities (e.g. CE, EMC, safety, radio), working with external labs and internal stakeholders • Support secure hardware foundations, including secure boot enablement in collaboration with embedded software colleagues • Manage hardware revisions, BOM management, and supply-chain constraints over the product lifecycle Skills • Bachelor's or Master's degree in Electrical Engineering, Electronics Engineering, or a related field • 5+ years of experience in hardware engineering for embedded or IoT systems • Proven experience owning hardware designs from specification through production • Strong experience coordinating and technically steering external hardware development partners • Solid understanding of embedded systems constraints and hardware–software interaction • Hands-on experience with hardware validation, debugging, and root-cause analysis • Practical exposure to certification processes and working with external test labs • Familiarity with manufacturing processes, production testing, and supply-chain considerations • Ability to work autonomously as the hardware specialist within a cross-functional team • Strong analytical skills and a structured, detail-oriented working style • Clear and effective communicator in English (German is a plus) • Previous work on energy-related hardware • Prior involvement in field-return analysis and systematic hardware root-cause investigations • Experience contributing to cross-functional architectural decisions beyond a single discipline • Passion for climate tech and distributed energy systems Benefits • 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 Company Overview • 1Komma5° is a home electrification and climatetech company that provides intelligent energy solutions and promotes a CO₂-neutral lifestyle. It was founded in 2021, and is headquartered in Hamburg, Hamburg, DEU, with a workforce of 1001-5000 employees. Its website is Apply tot his job