Senior Backend Engineer C#/.Net (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 11 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 Backend Engineer (C#/.Net) (m/f/d)

Join our team at our location in Berlin – hybrid working conditions available.

Our solutions contribute to flexible and customer-friendly payment alternatives. We offer consumers the opportunity to choose when and how they want to pay, whilst guaranteeing a steady and predictable cashflow for merchants. Our products make us proud, but not content and we have high ambitions for our existing as well as upcoming products. We have a strong commitment to building the future of FinTech — human-centric and sustainable. With investments to back it up. You will be part of a new and quickly growing product & tech organisation, having the opportunity to shape our new teams as well as build the next revolutionary products.

About the technologies we use:

Our teams have autonomy when it comes to tech choices. The example below will give you some insights, and we are looking forward to discussing this further with you.

• Design, develop, test, and ship robust, maintainable, and readable software, applications, APIs, and other workflows
• Initiate, participate in, and communicate technical architecture designs
• Attend regular scrum ceremonies as a member of an agile cross-functional team
• Analyze, discuss, and implement business requirements while maintaining good documentation of the systems and components you create
• Bring in industry standards and best practices to continually improve our codebase and architecture
• Make a positive impact on our engineering culture by adopting, implementing, and providing feedback on both organisational and industry standards and practices

All solutions developed cloud-native targeting Azure - Infrastructure defined using Terraform - Services deployed to Kubernetes clusters by default - A growing microservice ecosystem with event-based integration - Using latest .NET Core - RESTful API design - Single-page frontend apps served by CDN - Frontend tech using TypeScript, often Angular or standard Web Components (Stencil) - Automated tests in each layer.

Qualifications

What you bring:

• Hands-on experience with C# and the .NET framework, with a minimum of 5 years of experience
• Experience in developing, shipping, and maintaining cloud-based applications
• Good knowledge and experience working with microservices and distributed architectures
• A deep understanding and knowledge of RESTful APIs
• Years of experience using relational databases, preferably SQL Server. Additionally, working knowledge of ORMs, preferably Entity Framework
• Familiarity with cloud development; experience with Azure is a bonus
• Practical knowledge of using messaging platforms in a distributed architecture (e.g., RabbitMQ, Kafka)
• Knowledge and experience on a FinTech and banking industry is a plus
• Hands-on experience with AI-assisted development tools such as Claude, Cursor, or GitHub Copilot, and sound judgement about reviewing and testing what they produce, is a plus
• Fluent English

Please note: you need to have EU citizenship or a valid work permit for Germany.

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