Senior .Net Developer

About the Role

Achmea is looking for a practical and solution-oriented .NET Developer to strengthen our multidisciplinary development team in Apeldoorn. You’ll work in an Agile/Scrum environment, collaborating with professionals from different disciplines to deliver high-quality, secure, and maintainable software solutions.

This is an exciting long-term assignment (until at least July 2026) where you’ll help build and maintain robust APIs and backend systems that are critical to Achmea’s digital ecosystem.

Your Responsibilities

• Design, build, and maintain APIs using ASP.NET Core (.NET / C#.NET).

• Develop and optimize WEB/REST APIs and backend services.

• Apply Fluent Validation and Assertion to ensure code quality.

• Collaborate closely with your team in an Agile/Scrum setting.

• Use Azure DevOps for CI/CD pipelines, version control, and deployments.

• Manage defects and define product risks throughout the development lifecycle.

• Contribute to continuous improvement of processes, tools, and team practices.

Who You Are

• A practical problem solver with a proactive attitude.

• Team-oriented and open to feedback — both technical and personal.

• Experienced working in Agile/Scrum environments.

• Fluent in English (spoken and written).

• Brings at least 5+ years of relevant .NET development experience.

Technical Skills

Required:

• Experience with .NET / C#.NET and ASP.NET Core (API development).

• Strong understanding of WEB/REST APIs, MVC, XML/JSON.

• Experience with Fluent Validation / Assertion.

• Proficiency with GIT/TFS and Azure DevOps (CI/CD pipelines).

• Knowledge of defect management and product risk definition.

Nice to Have:

• Knowledge of ADO, OpenShift, or GITOps.

• Experience with test automation.

• Familiarity with SAP backend integration.

• Experience with Test Driven Development (TDD).

Why Join Achmea

At Achmea, you’ll work in a collaborative, forward-thinking environment where innovation and quality are key. You’ll have the opportunity to contribute to meaningful digital products that impact millions of customers — all while developing your technical skills and working with a talented team.

About Sytac:At Sytac, we’re on a mission to become the leading name in digital solutions. We aim to help Dutch companies stay ahead with the latest technology. We’re not just another IT company; we’re a lively team of tech enthusiasts dedicated to pushing the boundaries of what’s possible. Our success comes from our amazing team—people who love technology and are dedicated to being the best in everything we do.Our goal is to be recognized as one of the top 10 tech partners and one of the top 25 employers for tech professionals. Join us as we work to make a real difference in the world of technology!If you’re excited about leveraging your AI expertise to drive innovation and make a real impact, we’d love to hear from you!