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

1KOMMA5°

Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow.

Learn more about our Product & Tech team!

Your mission

As a (Senior) Product Engineer at 1KOMMA5°, you will take end-to-end ownership of features and workflows, making key decisions on architecture, integration layer, and solution design. You'll collaborate closely with product managers, designers, and engineers across teams to ship things that genuinely move the needle for our customers - and you won't be shy about challenging assumptions or proposing a better direction.

Our Stack:

• TypeScript, React / Next.js (frontend) and Node.js / NestJS (backend)
• AI-assisted development with Cursor and Claude Code
• GCP / Vercel, GitHub Actions (CI/CD)
• Linear, Notion, Figma, Miro

Key responsibilities include but are not limited to:

• Own feature development end-to-end, from problem framing to production deployment and long-term maintenance
• Build and integrate AI-powered product experiences using LLMs, agents, and tool-use patterns
• Define feature scope together with PMs - engage with the "why", not just the "what"
• Contribute to architectural decisions, API design, and AI integration patterns across the teams
• Keep feedback loops short: prototype, ship to real users, observe, adjust
• Push back when something doesn't make sense and propose better approaches

Your profile

• Strong fullstack proficiency in TypeScript, React / Next.js, and Node.js / NestJS
• Real, demonstrable experience building with LLMs, APIs, or MCPs - production use preferred
• A product and customer mindset: you think about user problems, not just implementation elegance
• Proven ability to own features end-to-end, from rough problem statement to shipped, maintained product
• Experience working closely with PMs and designers in a cross-functional team
• Excellent written and spoken English; German is a plus
• Residency in Germany

• Experience with agentic systems, tool-use patterns, or RAG pipelines
• Familiarity with the energy market, construction, sales, or climate tech context
• Prior experience in a startup or scale-up

Benefits

• You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen
• With your work, you accelerate the "energy transition" and hence have a direct impact on our climate
• Work with and learn from other super-smart colleagues
• You will enjoy direct contact with core decision-makers
• You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups
• You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich
• 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