Medior Full Stack C# Developer

About the role

We are looking for an interim Medior Full Stack C# Developer who wants to contribute directly to the energy transition in the Netherlands. You’ll work in a DevOps team that collaborates closely with the business, focusing on delivering digital solutions that impact thousands of households each year. You will help design, build, and maintain new features that support critical processes in the energy market.

What you’ll do

• Collaborate within a DevOps team to develop, refine, and maintain planned features.
• Work closely with stakeholders to achieve team goals.
• Ensure high-quality code by writing unit and integration tests.
• Contribute to the reliability and scalability of cloud-based solutions.

What you bring

• Proven experience with C# and ASP.NET Core (preferably .NET 8).
• At least 3 years of experience in a similar role.
• Experience with Entity Framework Core.
• Solid knowledge of CI/CD and Infrastructure as Code (GitLab, ArgoCD, Terraform).
• Strong experience with React and related front-end frameworks.
• Experience with AWS and Kubernetes.
• Familiar with RESTful principles and able to implement them effectively.
• Experience writing unit and integration tests using Xunit/Nunit and mocking frameworks.
• Bonus: experience with PostgreSQL, Grafana, Prometheus, Apache Kafka.

Who you are

• A self-driven professional with a structured and effective way of working.
• HBO-level (higher professional education) working and thinking capacity in IT or business/IT.
• Independent, professional, and quality-focused.
• Strong problem-solving and analytical skills.
• Flexible, adaptable, and eager to learn.
• A real team player who continuously looks for improvement.

Practical details

• Work 1–2 days per week on-site (Tuesdays and Fridays) in Amersfoort.
• Modern office with flexible workspaces and complimentary drinks.
• Professional fluency in Dutch is required.