Founding Product Engineer

About the Role This is a founding-team engineering role at an early-stage B2B energy-tech startup building an AI-powered platform that helps industrial companies optimise their energy procurement and consumption. You'll have end-to-end ownership of the product — from architecture and backend services to customer-facing UI — and a direct hand in shaping the company's technical direction from the ground up. What You'll Do Own the full product lifecycle from design through deployment. Translate product objectives into concrete requirements in close collaboration with customers. Design simple, iterative solutions to complex energy procurement and data problems. Build performant backend services for a data-intensive, real-time application. Develop intuitive, elegant user interfaces for complex decision-support workflows. Train time-series forecasting models for power consumption and renewables production. Develop linear optimisation algorithms aimed at reducing customer energy costs. Help choose and evolve the core tech stack (PostgreSQL, TypeScript, React, Python). What We're Looking For 2+ years of software engineering experience delivering scalable web applications in an early-stage or high-intensity startup environment. Proven ability to own and ship full product features independently, working directly with customers. Strong fundamentals in building robust, maintainable, and scalable web applications across backend and frontend domains. Experience with data-intensive backend services; familiarity with PostgreSQL, Python, TypeScript, and React is a strong plus. Hands-on experience or genuine interest in time-series forecasting and/or linear optimisation. Experience with FastAPI and/or Supabase is welcome but not required. Generalist product-minded engineer; a background as a startup CTO or founder is a meaningful plus. Comfortable with ambiguity, rapid iteration, and direct customer collaboration. Curiosity for energy markets and complex, data-driven business applications. Willingness to work on-site in Munich the majority of the week. Compensation & Benefits Salary: €85,000 – €140,000 per year Visa sponsorship: Not available Location Hybrid — primarily on-site in Munich, Bavaria, Germany , with flexibility for occasional remote work.