Sr. Back-end Developer

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The Yuki Company career site

Software Development · Rotterdam · Hybrid Sr. Back-end Developer Scale our core accounting engine or build our platform infrastructure: Which impact will you make?

join the RIDE

As Senior Back-end Developer, you own, build, and scale the core financial engine and infrastructure that form the heartbeat of our accounting platform. With your deep .NET expertise, you turn complex, business-critical systems into code that's fast, reliable, and built to last. Together with your team, you guide junior developers and help ship the features and integrations our platform depends on. And you don't just maintain what's there: you look for ways to make it faster, cleaner, and more resilient.

Time to grow. Time to thrive.

We are Nmbrs. We build smart business software that removes unnecessary complexity for SMEs and the professionals who support them. Nmbrs brings together four established product organisations-Payroll, Accounting, Invoicing and Reporting-with teams across the Netherlands, Sweden and Portugal.

We are one brand with a shared ambition, while continuing to work from the expertise and strengths of our individual organisations. We join forces where it makes sense, while keeping teams, expertise and decision-making close together.

For this role, you'll join Nmbrs Accounting in Rotterdam , working closely with the colleagues in your local team while being part of the wider Nmbrs organisation.

Your role

We are currently hiring two Senior Back-end Developers for two distinct, high-impact teams within our development organization: Team AO Ops and Team Platform .

As a senior developer, you participate in the entire application lifecycle - optimizing and refactoring existing codebases, enhancing the performance of critical applications, and building readable, maintainable, and performant code using the best software practices. You're also a technica...