Senior Software Engineer - Energy Markets (m/f/d)

At <strong>1KOMMA5°</strong>, we pursue a clear vision: <strong>Living on wind and sunlight forever for free</strong>. To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?<br><br>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><br><strong>Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow</strong>.<br><br>Become a part of our mission and learn <a href="https://1komma5.com/de/ueber-uns/jobs/tech/">more</a> about our Product &amp; Tech team!

We are looking for a <strong>Senior Software Engineer - Energy Markets</strong> to drive the technical direction of our Energy Markets workstream, with the potential to grow into a lead role.<br><br>Key responsibilities include:<br><ul><li>Build and optimize backend services for VPP operations and energy market integrations</li><li>Design systems at the intersection of backend and data processing pipelines</li><li>Drive technical decisions and guide fellow engineers on architectural choices</li><li>Navigate between data engineering, backend engineering, and energy market domains</li><li>Collaborate with product managers, data engineers, and data scientists across team boundaries</li></ul>

<span style="color:rgb(32,32,32);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;text-transform:none;background-color:rgb(255,255,255);display:inline;">The successful candidate will have:</span><br><ul><li>Proven experience developing scalable backend solutions with TypeScript</li><li>Data engineering fundamentals — designing systems bridging backend and data processing</li><li>Hands-on experience with energy service interfaces (smart meters, optimization, load balancing)</li><li>Strong knowledge of architectural patterns, CI/CD (GitHub Actions), and cloud infrastructure (GCP preferred)</li><li>Ability to guide architectural decisions, mentor engineers, and coordinate across domains</li><li>Passion for maintainable, documented, and testable code</li></ul>Bonus points for:<br><ul><li>Experience building virtual power plant infrastructure and energy market integrations</li><li>Python and BigQuery experience in Data Engineering or Machine Learning contexts</li><li>IoT experience for grid balancing and demand response</li><li>Infrastructure as Code experience (Terraform)</li><li>Familiarity with energy market APIs (EPEX Spot, Montel)</li></ul>

<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>