(Senior) Software Engineer (m/f/d)

Company Description

Everyone's story matters. Come shape your story with us at Riverty.
But where does that take you?
To one of our 30 hybrid workspaces – designed for exchanging ideas, learning from others, and shaping the way we work. An international community of over 4,000 people, representing almost 80 nationalities across 12 countries. United by one mission: Combining empathy, advanced technology and data-driven insights to keep people and businesses in flow. With payments made for them. So that they don't have to worry about it.
And there's more. We are part of the family-owned Bertelsmann group. Established. Corporate. In a fast-paced industry. We enable flexible payments in various industries, simplifying the financial management of known brands and helping people repay debt to build financial confidence. In short: shaping FinTech.

Job Description

We are looking for a

(Senior) Software Engineer (m/f/d)

(permanent, full-time) Join our team at our location in Baden-Baden, Berlin or Verl – flexible working conditions available

As a (Senior) Software Engineer within Riverty's debt collection business, you will develop and maintain modern cloud-based applications and contribute to the evolution of a central solution for knowledge transfer and collaboration. Playing an important role in Client Onboarding, the solution is still at an early stage of development, giving you the opportunity to shape its core functionality and APIs, drive continuous improvement, and contribute your technical expertise to consulting and onboarding activities.

• Develop, ship and maintain cloud-based applications using C# and .NET.
• Design microservices and distributed architectures and build robust RESTful APIs.
• Containerize applications with Docker, work with Kubernetes and contribute to CI/CD pipelines using Azure DevOps.
• Work with relational and NoSQL databases, including SQL Server, Entity Framework and MongoDB.
• Ensure software quality through unit and integration testing with frameworks such as xUnit or NUnit and mocking libraries such as Moq.
• Build secure and efficient solutions using authentication and authorization concepts such as OAuth2, Auth0 and JWT, as well as caching solutions such as Redis.
• Apply SOLID principles, design patterns and Clean Architecture or Domain-Driven Design to create maintainable software.

Qualifications

What will help you succeed in this role:

• 5+ of hands-on experience with C# and the .NET framework, combined with experience developing, shipping and maintaining cloud-based applications.
• Strong knowledge of microservices, distributed architectures and RESTful APIs.
• Practical experience with Docker and Kubernetes, plus good knowledge of CI/CD pipelines, preferably Azure DevOps.
• Several years of experience with relational databases, preferably SQL Server, and working knowledge of ORMs such as Entity Framework, alongside experience with NoSQL databases, preferably MongoDB.
• Solid experience with unit and integration testing, alongside a good understanding of authentication, authorization, caching and modern software design principles.
• Fluent English and a thoughtful, quality-focused approach to software development.
• Experience with Infrastructure as Code, preferably Terraform, and knowledge of the FinTech or banking industry are welcome advantages.
• Hands-on experience with AI-assisted development tools such as Claude, Cursor or GitHub Copilot, together with sound judgement when reviewing and testing their output, is a plus.

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