Senior Backend Engineer

Hi, we are Swapfiets! 👋 We are on a mission to make cities more liveable by getting more people on bikes. To make sure our members can enjoy the ride, we take care of everything around their bike subscription. We are looking for a Senior Backend Engineer to help us make that happen. You will work on complex problems, build reliable software and have a visible impact on our members and our business.

• HQ & Customer Service
• 1 year

What you will do

Subscription Management is at the heart of that experience. Our systems manage the subscription lifecycle, including changes, pricing, billing, payments and cancellations. We are continuing to evolve this domain, complete our migration from the legacy platform and build a strong foundation for the future.

What you will do:

• Design, build and maintain backend services for Subscription Management.
• Work on complex domain problems involving subscriptions, pricing, billing, payments and customer lifecycle changes.
• Translate business needs into practical and maintainable technical solutions.
• Take ownership of the systems you build in production, including monitoring, operational improvements and incident support.
• Help evolve the architecture of Subscription Management to support future business requirements.
• Identify risks, dependencies and inconsistencies in requirements, and communicate them early.
• Collaborate with Product, Design, Data, Operations and other engineering teams.
• Contribute to technical standards, design discussions and improvements to the way we work.
• Support other engineers through mentoring, pairing and constructive code reviews.
• Communicate important technical decisions through design documents, presentations and other suitable channels.

The gear you need:

• Several years of professional experience building backend software.
• Strong experience with C# and .NET.
• Experience designing and building APIs and distributed systems.
• Experience with relational databases, preferably Microsoft SQL Server.
• A strong understanding of automated testing, CI/CD, observability and secure development.
• Experience operating software in production and investigating incidents.
• Experience with Azure and Docker.
• You have hands-on experience with AI-enabled engineering tools, or you are a strong enthusiast who actively explores their practical use.
• You are eager to grow your AI skills and help colleagues grow theirs.
• The ability to work independently on complex problems and make sound technical decisions.
• Clear communication skills, both with technical and non-technical colleagues.
• A pragmatic mindset: you care about quality and long-term maintainability, while also delivering value incrementally.
• An interest in understanding complex business domains and improving them through software.

You do not need prior experience in the Subscription Management domain. We are looking for strong backend engineering skills and the ability to learn a complex business domain.

AI is already an important part of how we work at Swapfiets. You will collaborate with our strong AI team and use leading AI tools to improve how we build software and solve problems. You will also help colleagues discover and apply these tools effectively and responsibly.

Nice to have for the ride:

• Experience with subscriptions, billing, invoicing, payments or Stripe.
• Experience with financial data or reconciliation.
• Experience with event-driven systems and asynchronous workflows.
• Experience migrating from legacy systems to modern services.
• Experience with infrastructure as code.

Benefits for a smooth ride:

• Salary of up to €6,030 per month, excluding holiday pay.
• Your own Swapfiets through our lease plan 🚲
• 32 vacation days: 25 regular vacation days plus 7 Swap days to use as you please.
• A solid pension plan and a discount on your health insurance.
• A MacBook or Windows laptop, whichever you prefer.
• Lots of responsibility, challenging work and friendly colleagues.
• Travel allowance if you live more than 11 km from the office.
• Delicious lunch at the office for a small contribution.
• OneFit for Business.
• An education budget and learning programmes.
• Workshops and inspirational talks.
• One paid day per year for voluntary work.
• Flexibility to work from home or from our office in Amsterdam.

Why you should ride with us

Working at Swapfiets means joining the ride of your life. We pedal with purpose, knowing our work drives real impact for people, cities, and the planet. With a supportive team, open communication, and a flat structure, you’ll always have others cheering you on. As we move fast and tackle the unexpected twists along the way, we make sure the journey stays exciting, rewarding, and, most importantly, fun!

If you are excited about building reliable software, solving complex problems and helping shape the future of Subscription Management, we would love to hear from you!