1KOMMA5° At <strong style="border:0px solid;margin:0px;font-weight:600;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;background-color:rgb(255,255,255);">1KOMMA5°, we pursue a clear vision: <strong style="border:0px solid;margin:0px;font-weight:600;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;background-color:rgb(255,255,255);">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?<br style="border:0px solid;margin:0px;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);"><br style="border:0px solid;margin:0px;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);">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.<br style="border:0px solid;margin:0px;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);"><br style="border:0px solid;margin:0px;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);"><strong style="border:0px solid;margin:0px;font-weight:600;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;background-color:rgb(255,255,255);">Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow.<br style="border:0px solid;margin:0px;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);"><br style="border:0px solid;margin:0px;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);">Learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/" style="border:0px solid;margin:0px;color:inherit;text-decoration:underline;font-family:Inter , '-apple-system' , 'system-ui' , 'Segoe UI' , Roboto , 'Helvetica Neue' , 'Open Sans' , 'system-ui' , '-apple-system' , 'Segoe UI' , Roboto , Ubuntu , Cantarell , 'Noto Sans' , sans-serif , 'Apple Color Emoji' , 'Segoe UI Emoji';font-size:14px;font-style:normal;font-weight:400;background-color:rgb(255,255,255);">more</a> about our Product &amp; 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: <ul><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">TypeScript, NestJS, Next.js, Flutter</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">AI-assisted development with Cursor and agentic coding workflows</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">SQLMesh, BigQuery, Looker</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">GCP, Vercel, GitHub Actions, Datadog</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Linear, Notion, Figma, Miro</li></ul>Key responsibilities include but are not limited to: <ul><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Own feature development end-to-end, from problem framing through production deployment to long-term maintenance</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Define feature scope together with PMs and engage with the "why", not just the "what"</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Drive technical decisions and guide fellow engineers on architectural choices</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Keep feedback loops short: prototype, ship to real users, observe, adjust</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Use AI tools to amplify your impact and explore AI-powered product opportunities where they make sense</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Push back when something doesn't make sense and propose a better direction</li><li style="font-family:Arial , Helvetica , sans-serif;font-size:14px;">Improve developer experience by reducing tech debt, automating workflows, and documenting decisions and runbooks</li></ul> Your profile <ul><li>Solid backend engineering skills with a strong grasp of distributed systems; TypeScript experience is a plus but not required</li><li>Experience with at least one frontend framework</li><li>Familiarity with cloud infrastructure, CI/CD pipelines, and observability tooling; you understand how your code runs in production</li><li>Proven ability to own features end-to-end, from rough problem statement to shipped, maintained product</li><li>A product and customer mindset: you think about user problems, not just implementation elegance</li><li>Experience working in cross-functional teams with product managers and designers</li><li>You actively seek input from your peers and create visibility where it's lacking</li><li>Comfortable with ambiguity and proactive about asking for what you need to get the job done</li><li>Excited to leverage AI tools to enhance your impact, including agentic coding</li><li>You communicate ideas clearly and concisely in written and spoken English</li></ul>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: <ul><li>Flutter or mobile development experience</li><li>Data engineering fundamentals (BigQuery, data pipelines)</li><li>Hands-on experience with energy systems, IoT, or climate tech</li></ul>Bonus Points for  <ul><li>German language skills</li><li>Experience building AI-powered product features (LLMs, agents)</li><li>Prior experience in a startup or scale-up environment</li></ul> Benefits <ul><li>You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen</li><li>With your work, you accelerate the "energy transition" and hence have a direct impact on our climate</li><li>Work with and learn from other super-smart colleagues</li><li>You will enjoy direct contact with core decision-makers</li><li>You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups</li><li>You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li><li>Benefits and discounts are yours with Futurebens</li><li>Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time</li></ul>

1KOMMA5&deg; was founded in summer 2021 by entrepreneurs and industry experts with the aim of making buildings holistically CO2 neutral through the use of photovoltaics, heat pumps and charging infrastructure. This is implemented by providing technology for decentralized, clean energy, mobility and heat supply. Thanks to the intelligent energy management &ldquo;Heartbeat&rdquo; and the dynamic electricity tariff &ldquo;Dynamic Pulse&rdquo;, 1KOMMA5&deg; always guarantees the cheapest and cleanest electricity from sun and wind. 1KOMMA5&deg; participates in particularly innovative craft businesses in the areas of photovoltaics, electricity storage, charging infrastructure and heat pumps, on the one hand to strengthen regional crafts and on the other hand to enable high-quality advice and installation at the customer's site. 1KOMMA5&deg; currently operates over 65 locations with around 1,500 employees from Europe to Australia. In addition, 1KOMMA5&deg; is working on networking and controlling decentralized generation systems with the aim of fully realizing the potential of the decentralized energy transition. For this purpose, all installed systems become part of a networked IoT platform, which uses algorithms to guarantee optimal, automatic operational management over the life of the system.

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

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 <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; 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: <ul><li>TypeScript, NestJS, Next.js, Flutter</li><li>AI-assisted development with Cursor and agentic coding workflows</li><li>SQLMesh, BigQuery, Looker</li><li>GCP, Vercel, GitHub Actions, Datadog</li><li>Linear, Notion, Figma, Miro</li></ul>Key responsibilities include but are not limited to: <ul><li>Own feature development end-to-end, from problem framing through production deployment to long-term maintenance</li><li>Define feature scope together with PMs and engage with the "why", not just the "what"</li><li>Drive technical decisions and guide fellow engineers on architectural choices</li><li>Keep feedback loops short: prototype, ship to real users, observe, adjust</li><li>Use AI tools to amplify your impact and explore AI-powered product opportunities where they make sense</li><li>Push back when something doesn't make sense and propose a better direction</li><li>Improve developer experience by reducing tech debt, automating workflows, and documenting decisions and runbooks</li></ul> Your profile <ul><li>Solid backend engineering skills with a strong grasp of distributed systems; TypeScript experience is a plus but not required</li><li>Experience with at least one frontend framework</li><li>Familiarity with cloud infrastructure, CI/CD pipelines, and observability tooling; you understand how your code runs in production</li><li>Proven ability to own features end-to-end, from rough problem statement to shipped, maintained product</li><li>A product and customer mindset: you think about user problems, not just implementation elegance</li><li>Experience working in cross-functional teams with product managers and designers</li><li>You actively seek input from your peers and create visibility where it's lacking</li><li>Comfortable with ambiguity and proactive about asking for what you need to get the job done</li><li>Excited to leverage AI tools to enhance your impact, including agentic coding</li><li>You communicate ideas clearly and concisely in written and spoken English</li></ul>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: <ul><li>Flutter or mobile development experience</li><li>Data engineering fundamentals (BigQuery, data pipelines)</li><li>Hands-on experience with energy systems, IoT, or climate tech</li></ul>Bonus Points for  <ul><li>German language skills</li><li>Experience building AI-powered product features (LLMs, agents)</li><li>Prior experience in a startup or scale-up environment</li></ul> Benefits <ul><li>You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen</li><li>With your work, you accelerate the "energy transition" and hence have a direct impact on our climate</li><li>Work with and learn from other super-smart colleagues</li><li>You will enjoy direct contact with core decision-makers</li><li>You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups</li><li>You work remotely (Germany-wide), with offices in Hamburg, Berlin or Munich</li><li>Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass</li><li>Benefits and discounts are yours with Futurebens</li><li>Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time</li></ul>

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

About the Job

About the Company

1KOMMA5°

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