Mid-Senior Product Designer

A ~75 person startup founded in Berlin, part of Y Combinator's S24 batch, building the operating system for heat pump and solar panel installers. The Product Designer works across Heating, Solar, Core and AI products with experienced engineers and dedicated product managers. The team ships prototypes fast, runs product discovery with direct customer engagement, and is building an AI voice agent leveraging LLMs and NLP. This role requires native-level German and hybrid work from Berlin.