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 Stockholm – 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. What You’ll Actually Be Doing As part of a cross-functional product team, you’ll take meaningful ownership across the full software lifecycle: Build & scale core services: Design, build, and ship robust backend services, APIs, and business-critical workflows using modern C# and .NET.Shape system architecture: Drive decisions on scalability, resilience, and performance for high-throughput distributed systems.Turn requirements into reality: Partner with product managers, designers, and domain experts to translate complex business needs into pragmatic technical solutions.Elevate the team: Mentor colleagues, conduct thoughtful code reviews, and share knowledge to help the engineering group grow.Own production health: Champion automated testing, clean documentation, and reliable deployment practices so we ship with confidence. Qualifications Who you are: You’re an experienced engineer who enjoys untangling complex problems and balances engineering excellence with pragmatic delivery: Backend depth: 8+ years of hands-on software engineering experience, with deep expertise in C# and modern .NET.Distributed systems: Practical experience designing clean REST APIs, message queues, event-driven workflows, and asynchronous communication patterns.Data fluency: Strong background with relational databases (e.g., SQL Server, PostgreSQL), query optimization, and ORMs like EF Core or Dapper.Cloud & DevOps: Experience deploying and managing containerized services (Docker/Kubernetes) in cloud environments, ideally Microsoft Azure.Observability & troubleshooting: Skilled at diagnosing and resolving complex production issues using logs, metrics, and distributed tracing.Pragmatic tooling: Comfortable leveraging AI coding assistants (e.g., GitHub Copilot, Cursor) to move faster, while applying sharp judgment to ensure security and code quality.Clear communication: Fluent in English, with the ability to explain technical trade-offs to both engineering peers and non-technical partners.Bonus points: Prior experience with FinTech, banking, payments, or ledger/accounting systems is a strong plus. Please note: you need to have EU citizenship or a valid work permit for Sweden. Additional Information Disclosure requirements pertaining to the collection of your personal data: Responsible for processing the information provided in your application is the company specified in the job advertisement, with its registered office as indicated. The company processes your data for the purpose of establishing an employment relationship on the basis of Art. 6 (1) b GDPR / Section 26 (1) sentence 1 BDSG. The retention period for your data is determined by the statutory time limits applicable in the respective country, beginning upon completion of the recruitment process. You can find these here. You can contact the company’s Data Protection Officer at the above-mentioned postal address. Further information on data protection and your rights can be found here. Recruiting-Platform powered by SmartRecruiters.