About this role
C# Developer Coolblue Software Engineering Rotterdam, Netherlands Posted on Jun 5, 2026 Apply now Together with the developers from your team, you design, realize, and maintain the software that brings a smile to the faces of your colleagues and our customers. What does a C# Developer at Coolblue do? As a C# Developer, you're responsible for maintaining and developing products that support your domain together with your team. You do this by writing maintainable, testable and future-proof code. You also regularly participate in brainstorm sessions on user experience, data, and task flow with the UX Designer, Product Owner, and Data Scientist in your domain. Want to become a C# Developer at Coolblue? Read below if it suits you. - Solving problems with the best practices and principles that we've embraced, such as Clean Architecture, TDD/BDD, SOLID, and design patterns. - Writing automated tests so you know that the quality of your software is on point. - Working with various types of data storage, such as Oracle, MySQL, and DynamoDB. - Show ownership over the solutions in the portfolio of your domain by solving challenges in time by logging and monitoring Datadog. - Sharing knowledge by mentoring, pair programming sessions, and adding constructive comments to pull requests from colleagues in Github. - Getting space to keep developing and to delve into the latest technologies. - Giving and receiving constructive feedback. - Presenting deliverables during sprint demos. - Programming language: C# .NET 8.0 - Data storage: Oracle, MySQL, PostgreSQL en DynamoDB. - Cloud platform: AWS - CI/CD: Github en TeamCity - Logging/Monitoring: Datadog You recognize yourself in the following - At least 3+ years (medior) or 6+ years (senior) of experience as a C# developer. - You have a Bachelor's or Master's degree in Computer Science or a comparable field. - Good experience with software architecture and building application in .NET ...