About the Role Join a small product engineering team at an early-stage energy technology company. You will work closely with customers and own end-to-end engineering work on energy retail challenges, turning complex operational needs into intuitive, production-ready products. What You'll Do • Work directly with customers to understand their problems and guide product and engineering decisions. • Build and ship full-stack features from discovery through production. • Use AI-native development tools to accelerate delivery and improve your impact. • Take ownership of zero-to-one projects, including customer billing and portal experiences. • Prioritize initiatives, decide what to build, and stop work that is not delivering value. • Address energy retail needs such as procurement, customer retention, and cost optimization. • Help shape engineering culture, tools, and processes, and support team growth. What We're Looking For • Typically 2 to 13 years of experience, with evidence of exceptional technical ability through shipped products, founding work, research, competitions, or comparable accomplishments. • Strong full-stack skills and experience delivering products end to end, from discovery to production. • Comfort using AI-native coding tools as part of your development workflow. • Fluent German at C1 level or above. • A degree from a strong university and experience at an early-stage startup are valued. • Experience or strong interest in energy retail, including billing, procurement, retention, or cost optimization. • High ownership, sound judgment, and comfort working in an ambiguous, fast-moving environment. Compensation & Benefits Annual salary: EUR 80,000 to EUR 120,000. Visa sponsorship is not available. Location On-site in Berlin, Germany, normally five days per week.