About The Role

We are looking for a Senior Full Stack .NET Developer to strengthen our internal development team.

In this role, you will contribute to a wide range of business-critical applications, balancing the maintenance and modernization of existing systems with the development of new solutions. While the position has a strong backend focus, you are comfortable working across the full application lifecycle, from backend and frontend development to deployment and continuous improvement.

You enjoy solving complex technical challenges, taking ownership and working independently. You don't just build solutions, you think about how they can evolve and create long-term value.

At DEME, we continuously explore new technologies and ways of working. As part of this journey, you will have the opportunity to leverage modern development practices, including AI-assisted development and emerging agentic development approaches, to help shape the future of our application landscape. Y our responsibilities

Design, develop and maintain applications using .NET and modern web technologies.
Build, enhance and support backend services, APIs and integrations.
Contribute to frontend development using React and/or Blazor.
Support, maintain and modernize existing legacy applications while helping define future migration paths.
Translate business requirements into scalable and sustainable technical solutions.
Take ownership of projects from analysis and development through testing, deployment and support.
Contribute to application architecture and technical decision-making.
Work with CI/CD pipelines, source control and modern software engineering practices.
Ensure code quality through testing, reviews and documentation.
Explore and apply modern development practices, including AI-assisted development and emerging technologies, where they add value.
Share knowledge and collaborate with colleagues across teams.

Your profile

Minimum 5 years of experience in software development within a .NET environment.
Strong knowledge of C#, .NET (.NET Core / .NET) and ASP.NET.
Experience building and consuming REST APIs.
Experience with React and/or Blazor.
Familiarity with WPF or WinForms, or willingness to work with and modernize legacy applications.
Experience with Git and CI/CD practices.
Knowledge of Azure, containerization technologies (Docker, OpenShift, Kubernetes) or cloud-native development is a plus.
Interest in modern software development practices and emerging technologies.
Strong analytical and problem-solving skills.
Able to work independently and take ownership of technical challenges.
Interest in architecture, technical direction and continuous improvement.
Fluent in English. Knowledge of Dutch is a plus.

Our offer

An extensive mobility program for a healthy work-life balance.
A permanent training track which allows you to develop yourself personally and professionally.
A stimulating, innovative workplace with growth opportunities.
A people-oriented environment with an interactive health program and a focus on employee wellbeing.