(Senior) Product Engineer - Heartbeat

Stack

Responsibilities

• ▹Own feature development end-to-end, from problem framing through production deployment to long-term maintenance
• ▹Define feature scope together with PMs and engage with the why, not just the what
• ▹Drive technical decisions and guide fellow engineers on architectural choices
• ▹Keep feedback loops short: prototype, ship to real users, observe, adjust
• ▹Use AI tools to amplify your impact and explore AI-powered product opportunities
• ▹Push back when something does not make sense and propose a better direction
• ▹Improve developer experience by reducing tech debt, automating workflows, and documenting decisions and runbooks

Requirements

• ▹Solid backend engineering skills with a strong grasp of distributed systems
• ▹Experience with at least one frontend framework
• ▹Familiarity with cloud infrastructure, CI/CD pipelines and observability tooling; understanding of how your code runs in production
• ▹Proven ability to own features end-to-end, from rough problem statement to shipped, maintained product
• ▹A product and customer mindset: thinking about user problems, not just implementation elegance
• ▹Experience working in cross-functional teams with product managers and designers
• ▹Excitement about leveraging AI tools, including agentic coding
• ▹Clear and concise communication in written and spoken English
• ▹At least one of: Flutter or mobile development experience; data engineering fundamentals (BigQuery, data pipelines); hands-on experience with energy systems, IoT or climate tech

Nice to have

• ▹TypeScript experience
• ▹German language skills
• ▹Experience building AI-powered product features (LLMs, agents)
• ▹Prior experience in a startup or scale-up environment

Soft skills

What we offer

• ▹International, dynamic, highly motivated team
• ▹Direct impact on the energy transition and the climate
• ▹Learning from smart colleagues and direct contact with core decision-makers
• ▹Chance to enter full-time at one of Europe's most thriving scaleups
• ▹Remote work within Germany, with offices in Hamburg, Berlin or Munich
• ▹EGYM Wellpass
• ▹Benefits and discounts via Futurebens
• ▹City bike or e-bike leasing

About the company

1KOMMA5° pursues the vision of living on wind and sunlight forever for free. With Heartbeat AI it builds the energy system of the future, controlling solar, batteries, heat pumps and e-mobility as one intelligent, integrated virtual power plant. Over 3,000 people work at more than 80 locations worldwide.