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

1KOMMA5°

Role overview

Qualifications

  • 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
  • Experience working in cross-functional teams with product managers and designers

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
  • Improve developer experience by reducing tech debt, automating workflows, and documenting decisions and runbooks

About the company

1KOMMA5° logo

1KOMMA5°

Sustainable development

1KOMMA5° wurde im Juli 2021 mit dem Ziel gegründet, alle Gebäude CO2 neutral zu machen. Dies erfolgt durch den Einsatz von Photovoltaik, Wärmepumpe und Ladeinfrastruktur in Verbindung mit einer intelligenten und individuellen Steuerung aller Systeme basierend auf künstlicher Intelligenz, um den besonders günstigen Preiszonen von Sonne und Wind direkt an der Strombörse zu folgen. Nach drei Jahren hat das Unternehmen bereits 100.000 Kunden bedient und gilt damit laut EUPD Studie seit 2024 als europäischer Marktführer. Technologisches Herzstück ist die Software Plattform “Heartbeat AI”. Sie verbindet Wärmepumpe, Ladesäulen und Strombatterien direkt mit der Strombörse und steuert jedes einzelne Systeme nach individuellen Fahrplänen durch künstliche Intelligenz. So wird individuell immer der jeweils günstigste und sauberste Strom bereitgestellt, ob vom eigenen Dach oder vom Energiemarkt. Zurzeit betreibt 1KOMMA5° über 75 Standorte und Meisterbetriebe mit rund 2.200 Mitarbeitenden von Europa bis Australien. Zusätzlich arbeitet 1KOMMA5° kontinuierlich an der Weiterentwicklung der Heartbeat AI 🤖 Platform hierzu arbeiten allein am Entwicklungsstandort in Berlin über 200 Entwicklerinnen und Entwickler. Bereits 30% der mit Heartbeat AI verbundenen Haushalte erwirtschaften durch den Verkauf von Strom in Hochpreisphasen mehr Erlöse als sie Stromkosten. Insgesamt steuert das System nach kurzer Zeit bereits über 40.000 Energiesysteme.

Company details

Company typeScaleup
IndustrySustainable development
Company size1001 - 5000

Links

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Job description

1KOMMA5°

At 1KOMMA5°, we pursue a clear vision: Living on wind and sunlight forever for free. To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?

We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and particularly cost-effective. By 2030, our goal is to transition 1.5 million households to renewable energies. Over 3,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia.

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 part of one of our teams around Heartbeat AI, you will help building our virtual power plant leveraging our energy manager "Heartbeat", and continuously ship innovative energy market solutions to our customers.
This is a builder role at the intersection of engineering and product: you co-own the product, define what gets built together with your cross-functional team, ship it fast, and use AI as a force multiplier along the way. Cloud Architects and SREs will enable you to easily deliver and run software in a consistent, secure, and reliable way.

Our Stack:
  • TypeScript, NestJS, Next.js, Flutter
  • AI-assisted development with Cursor and agentic coding workflows
  • SQLMesh, BigQuery, Looker
  • GCP, Vercel, GitHub Actions, Datadog
  • Linear, Notion, Figma, Miro
Key responsibilities include but are not limited to:
  • 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 where they make sense
  • Push back when something doesn't make sense and propose a better direction
  • Improve developer experience by reducing tech debt, automating workflows, and documenting decisions and runbooks

Your profile

  • Solid backend engineering skills with a strong grasp of distributed systems; TypeScript experience is a plus but not required
  • Experience with at least one frontend framework
  • Familiarity with cloud infrastructure, CI/CD pipelines, and observability tooling; you understand 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: you think about user problems, not just implementation elegance
  • Experience working in cross-functional teams with product managers and designers
  • You actively seek input from your peers and create visibility where it's lacking
  • Comfortable with ambiguity and proactive about asking for what you need to get the job done
  • Excited to leverage AI tools to enhance your impact, including agentic coding
  • You communicate ideas clearly and concisely in written and spoken English
Ideally You Also Bring One of These
You check at least one of these boxes. It's how we match you to the right team:
  • Flutter or mobile development experience
  • Data engineering fundamentals (BigQuery, data pipelines)
  • Hands-on experience with energy systems, IoT, or climate tech
Bonus Points for 
  • German language skills
  • Experience building AI-powered product features (LLMs, agents)
  • Prior experience in a startup or scale-up environment

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

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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