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# (Senior) Software Engineer (Backend) - B2B Squad

- **Company:** Instaffo GmbH
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Microsoft Azure, Cursor (Graphical User Interface Elements), MongoDB, Cloud Platform System, Backend, Event Driven Architecture, Kubernetes, Api Management, Docker
- **Published:** July 17, 2026
- **Apply:** https://de.indeed.com/viewjob?jk=28537c9e854f9332

## About the Role

The language requirements for this position are: English - Fluent, German - Fluent.

We are looking for a Senior Software Engineer to architect and build the backend systems for our innovative B2B electricity products. This is a unique opportunity to shape a largely untapped market and directly impact how businesses manage their energy consumption, turning a fixed cost into a controllable lever. You will be a key player in driving our growth and defining the future of energy management., Must-Have Qualifications:

 * Strong in C# and .NET Core.
 * Solid understanding of MongoDB, Docker, Kubernetes, and cloud environments (GCP/Azure).
 * Comfortable with CI/CD pipelines, TDD, and agile development principles.
 * AI coding tools like Claude or Cursor are part of your natural workflow.
 * Fluent in English.
 * Based in or willing to relocate to Berlin or Hamburg.

Bonus:

 * Experience in the energy sector, with billing/settlement or pricing systems, event-driven architecture, or building B2B/API products.



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