Senior .NET Developer

At KMD, we build digital solutions used by millions of people around the world. These solutions are the digital foundations of our most important institutions, from governments and public services to financial industries and private companies. Our mission is to ensure that they are reliable, accessible, and efficient.

We believe that the future is what you make it. So a career at KMD is a career with purpose and freedom. One where you’ll have a direct hand in improving the lives of people, while being empowered with the resources and autonomy to shape the course of your own professional journey. 

Warsaw (Hybrid – Poland-based)

Contract: B2B | 120–160 PLN/hour net

About Us

KMD Boliglån is the market leader in managing loans for housing deposits in Denmark. We provide a comprehensive, feature-rich platform that handles everything from automated accounting and payouts to income verification, document workflows, and regulatory compliance. We are looking for a skilled .NET Developer to join our team to modernize, maintain, and enhance this high-impact solution.

Your Role

You will be part of an experienced, cross-functional development team that:

• Develops and maintains a rich .NET client interfacing with a mainframe core (z/OS)

• Implements changes driven by frequent legal/regulatory updates in Danish public administration

• Enhances features like automated payouts, digital mail, credit/debit integration, report generation

• Collaborates with backend specialists to ensure seamless workflows

• Contributes to modernizing and optimizing codebases, tooling, and developer experience

Our Tech Stack

• Client: C#, .NET, WPF, DevExpress WPF components

• Web: ASP.NET MVC, ASP.NET Core

• Integration: SOAP services (100+ webservices to Mainframe) and interaction with 3. Party services through a wide range of different technologies

• Tools: Visual Studio with GitHub Copilot

• DevOps & Workflow: Agile/Scrum, CI/CD, Azure DevOps, code reviews, Docker and Kubernetes

• Mainframe: z/OS, DB2, CICS, PL/I, Batch, MQ, RDz (Eclipse IDE)

What We Expect From You

• 4+ years of experience with .NET development, ideally WPF and Web based applications

• Strong C# skills and a good understanding of UI component libraries (e.g., DevExpress)

• Familiarity with integration patterns (web services, messaging, REST and XML-based interfaces)

• Willingness to work in a hybrid architecture (.NET, Cloud, mainframe, Desktop and web clients)

• Solid understanding of software design, data flows, and maintainability in large-scale systems

• English proficiency (spoken and written)

Nice-to-Have Skills (Quick to Learn If You’re Not Familiar) 

• Interest in public sector or regulated environments

• Background in handling complex workflows, legal logic, or compliance-related solutions

• Experience with GitHub Copilot

Why Join Us?

• You are a team player, that wants to be part of the team behind Denmark’s most complex loan platform supporting real-life public needs

• You thrive in stable cross-border teams consisting of Danish domain experts and Polish developers

• You want to be a part of a team with high autonomy, purpose-driven work, and modern Agile development practices

• You are engaged by nature and takes responsibility to help find the best possible solutions, but also pragmatic if and when the timeline is short

• You want to have direct impact on citizen-facing financial solutions

• Competitive B2B rate, flexible work-from-home arrangements

KMD (an NEC company) is committed to providing equal opportunities. Hence, we invite all qualified interested applicants to apply for career opportunities. At KMD all aspects of employment and cooperation including the decision to hire/cooperate with will be based on merit, competence, performance, and business needs without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, or any other status protected under local anti-discrimination legislation.

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