Senior Software Engineer - Energy Markets (m/f/d)
About this role
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 more about our Product & Tech team!
Your mission
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
Your profile
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
- 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
About us
Company at a glance
1KOMMA5° wurde gegründet um Millionen Gebäude in Europa klimaneutral immer mit dem günstigsten Strom zu versorgen - ganz ohne fossile Energie.
Mit „Heartbeat AI“ betreibt 1KOMMA5° Europas größtes dezentrales Kraftwerk. Heartbeat AI steuert Elektroautos, Batterien, Wärmepumpen oder Klimaanlagen und handelt sie in Echtzeit an der Strombörse. Das System kauft Strom wenn er besonders günstig ist und verkauft Strom wenn er teuer ist. In Summe profitieren Nutzer von nahezu kostenlosem Strom.
Das Konzept gilt als günstigere Alternative zu fossilen, zentralen Kraftwerken und könnte laut einer Roland-Berger-Studie aus dem Jahr 2025 bis zu 255 Milliarden Euro an Stromkosten einsparen.
Inzwischen steuert „Heartbeat AI“ rund 50.000 Energiesysteme mit einer Leistung von 600 Megawatt, was etwa der Leistung eines modernen Gaskraftwerks entspricht.
1KOMMA5° ist aktuell in sieben Ländern aktiv und betreibt 80 Standorte, um Installation und Service als "One Stop Shop" für Kunden regional und in höchster Qualität sicherzustellen.
Top Benefits
- EGYM Wellpass
- Futurebens discounts
- Job bike leasing
- International team
- Climate impact
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