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1KOMMA5 Logo 1KOMMA5 · IT - Software Development

Senior Backend Vpp Software Engineer - Typescript

Germany, Berlin · Job Posted March 01, 2026
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Job Description

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. 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.

Job Responsibility

  • Build a virtual power plant leveraging our energy manager "Heartbeat", and continuously ship innovative energy market solutions to our customers
  • Develop scalable, robust backend services that enable seamless integration of our energy management solutions with various energy markets
  • Work collaboratively with product managers, data engineers, and data scientists to understand problems, support discoveries, and create solutions our customers love
  • Build and optimize backend services for VPP operations and energy market integrations
  • Design and implement APIs and abstraction layers for seamless communication between different components of our energy market integration solutions
  • Optimize backend services for scalability and support for a large number of connected users
  • Create, implement, evaluate, and deploy software solutions to solve complex problems in a simplified way
  • Foster a culture of experiment-driven innovation within the team
  • Promote teamwork and successful project execution
  • Continuously improve developer satisfaction by avoiding/reducing tech debt, automating processes, and good documentation
  • Work across your boundaries and interact in close collaboration with our stakeholders and other teams

Requirements

  • Proven experience in developing scalable backend solutions with TypeScript from several past projects
  • Competence in building virtual power plant infrastructure, including the integration into energy markets (day-ahead, intraday, balancing services, etc)
  • Hands-on experience working with interfaces in the context of energy services (e.g., smart meters, energy optimization, load balancing)
  • Broad knowledge of various architectural patterns and experience implementing them with CI/CD using GitHub Actions and cloud infrastructure (ideally GCP)
  • Passion for maintainable, documented, reusable, and testable code
  • A finger on the pulse of software engineering trends and industry best practices
  • An agile and product-oriented mindset and you consider yourself a team player
  • Very strong written and spoken English skills, German is a plus

Nice to have

  • Experience with IaC (ideally Terraform)
  • Experience Python in the context of Data Engineering or Machine Learning
  • Experience with IoT applications for grid balancing and demand response

What we offer

  • 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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