(Senior) Product Engineer (m/f/d)

In this role you shape the virtual assembly line and AI-powered product experiences to scale our energy tech globally. You own end-to-end features, influence architecture and API design, and partner with product, design, and engineering to move the needle for customers. You apply AI as a multiplier across the workflow and push for better solutions when needed. You join a mission-driven team building the energy system of the future.

• remote work (Germany-wide)
• offices in Hamburg, Berlin or Munich
• EGYM Wellpass benefits
• Futurebens discounts
• bike leasing for city/e-bike
• direct contact with core decision-makers

• Own end-to-end feature development from problem framing to deployment and maintenance
• Build and integrate AI-powered product experiences using LLMs, agents, and tool-use patterns
• Define feature scope with PMs, focusing on the why behind the what
• Contribute to architectural decisions, API design, and AI integration patterns
• Maintain short feedback loops: prototype, ship to real users, observe, adjust
• Push back when something doesn’t make sense and propose better approaches

• Strong fullstack proficiency in TypeScript, React/Next.js, and Node.js/NestJS
• Proven experience with building with LLMs, APIs, or MCPs in production
• Product and customer mindset with a track record of owning features end-to-end
• Experience collaborating with PMs and designers in cross-functional teams
• Excellent English; German a plus; residency in Germany

• customer-centric thinking
• ability to challenge assumptions
• cross-functional collaboration
• TypeScript
• React/Next.js
• Node.js/NestJS