Senior Backend Engineer (C# & AWS)

Northmill Bank is a challenger bank at the intersection of technology and finance, committed to revolutionizing the way people manage and protect their financial well-being. We are creating a different kind of banking experience, digital yet personal.

Northmill Bank was founded in 2006 and have grown to over 200 employees in 3 countries, 4 000 merchants and 600 000 end users. We use the latest technology to develop safe, smart, and user-friendly products for our customers. They are the sole reason why we do what we do. We are a 100% cloud-based product company where technology is the driver to create smarter banking products.

Grab this opportunity to be a part of us and our journey!

About the role

As a Senior Backend Engineer, you will play a key role in designing and developing modern financial applications that power our banking ecosystem. You will build and enhance advanced monitoring systems that support our operations in AWS cloud environments, ensuring reliability, performance, and scalability.

In this role, you'll collaborate closely with our business teams and the clients who rely on our products, giving you meaningful influence over how our applications evolve.

Your daily work will involve technologies such as C#, .NET, ASP.NET, and AWS (including Fargate, Lambda, S3, and EventBridge), as well as tools like Jira, Confluence, Git, and Rider/Visual Studio. You will work with established architectural patterns such as DDD and CQRS, and you’ll also leverage modern AI-powered development tools to boost productivity and code quality.

Required qualifications:

5+ years of commercial experience in creating web applications.

Solid experience developing applications using C#.

Solid experience in working with SQL databases.

Willingness and interest to collaborate and work in a team.

Stockholm as a place of living & SE citizenship or EES Resident status.

Preferred qualifications:

Experience with software engineering best practices (code reviews, continuous