Junior Software Engineer – End-to-End Aggregation Platform (m/f/d)

To grow our platform, we’re looking for someone at the start of their career who is keen to learn across the entire stack – from the device in the field to the market interface.

Join us full-time or as a working student.

• Development: You work on new features and improvements to our platform – in the backend (Python/Django), on APIs and on connecting assets via edge devices.
• Operations: You support monitoring and troubleshooting so that our platform runs reliably.
• Quality: You write automated tests and help develop our CI/CD pipelines further.
• Infrastructure: You learn to build and maintain cloud infrastructure with infrastructure as code (Terraform) and containers.
• Documentation: You keep data flows, interfaces and processes clearly documented.
• Collaboration: You work closely with our Technical Lead and learn how customer requirements become technical solutions.

• A completed or ongoing degree in computer science, electrical engineering, energy engineering or similar – or comparable practical experience
• First experience in software development, e.g. from your studies, internships, working-student jobs or your own projects
• Good knowledge of Python or a comparable programming language
• First experience with agent-based software development, e.g. with coding agents such as Claude Code, Cursor or GitHub Copilot
• A basic understanding of Git, Linux and networking
• Curiosity, initiative and a willingness to take on responsibility
• A structured way of working and enjoyment in understanding problems thoroughly
• Very good German or English

• Some exposure to Docker, cloud services or CI/CD
• An interest in IoT/embedded, e.g. Modbus or Raspberry Pi projects
• An interest in the energy industry (flexibility trading, battery storage, virtual power plants)

You don’t need to know all of it – much of it you’ll learn with us in the team:

Backend

Python/Django, API design, asynchronous processing

IoT & Edge

Modbus/TCP, device management

Infrastructure

Terraform, Docker, Kubernetes, European cloud providers

Monitoring

Prometheus, Grafana, OpenTelemetry

Security

WireGuard, TLS/mTLS

CI/CD

GitLab pipelines, automated tests

• Meaningful work on infrastructure that makes flexibility usable for the energy transition
• A steep learning curve: you work on real production systems from day one – supported by experienced colleagues
• Broad insight across the entire stack, from edge to cloud and the electricity market
• Short decision paths and the chance to help shape tools and team culture in an early-stage start-up
• A small, ambitious and diverse team with experience from the battery and energy industry
• Flexible working models and real development prospects