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

Title: Senior Software Engineer - Energy Markets (m/f/d) Location: Berlin, Germany ## 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**. Become a part of our mission and learn about our Product & Tech team! ## Deine Position We are looking for a **Senior Software Engineer - Energy Markets** to drive the technical direction of our Energy Markets workstream, with the potential to grow into a lead role. Key responsibilities include: * Build and optimize backend services for VPP operations and energy market integrations * Design systems at the intersection of backend and data processing pipelines * Drive technical decisions and guide fellow engineers on architectural choices * Navigate between data engineering, backend engineering, and energy market domains * Collaborate with product managers, data engineers, and data scientists across team boundaries ## Dein Profil The successful candidate will have: * Proven experience developing scalable backend solutions with TypeScript * Data engineering fundamentals — designing systems bridging backend and data processing * Hands-on experience with energy service interfaces (smart meters, optimization, load balancing) * Strong knowledge of architectural patterns, CI/CD (GitHub Actions), and cloud infrastructure (GCP preferred) * Ability to guide architectural decisions, mentor engineers, and coordinate across domains * Passion for maintainable, documented, and testable code Bonus points for: * Experience building virtual power plant infrastructure and energy market integrations * Python and BigQuery experience in Data Engineering or Machine Learning contexts * IoT experience for grid balancing and demand response * Infrastructure as Code experience (Terraform) * Familiarity with energy market APIs (EPEX Spot, Montel) ## 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