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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Back-end C# .NET Developer - **Company:** ITS Group - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** ASP.NET, .NET Framework, Application Programming Interfaces (APIs), Agile Methodology, Amazon Web Services, Macintosh Application Environment, Unit Testing, C Sharp (Programming Language), Continuous Integration, Relational Databases, DevOps, Entity Framework, Identity and Access Management, Microsoft SQL Server, MySQL, NHibernate, Object-Oriented Software Development, Scrum Methodology, RabbitMQ, Mockito, Swagger, Software Engineering, Systems Integration, Openapi, Backend, Git, Servicebus, Event Driven Architecture, Solid Principles, Asynchronous Programming, Api Design, Domain Driven Design, Code Restructuring, Software Version Control, Microservices - **Published:** May 22, 2026 - **Apply:** https://be.indeed.com/viewjob?jk=dd32eb0ad3aad7d1 ## About the Role Do you have experience in gRPC?, Minimum 5 years of experience in back-end application development or integration services. Strong experience with C# and .NET. ASP.NET experience. Good understanding of asynchronous programming with async/await. Strong object-oriented programming knowledge. Solid understanding of SOLID principles. Experience with ORM frameworks such as Entity Framework or NHibernate. Experience with unit testing and mocking. API design experience: REST or gRPC. OpenAPI / Swagger knowledge. Experience with relational databases such as MSSQL or MySQL. Git or another source control management tool. Strong analysis skills. Ability to work independently and in Agile mode. Professional proficiency in English. Nice to have: Microservices architecture. Event-driven architecture. Service bus / NServiceBus. RabbitMQ. Domain Driven Design. CI/CD. AWS exposure. Votre profil You have at least 5 years of professional experiences in IT If you are at least fluent in ENG it's best You're eager to learn, motivated and curious ## Description The mission takes place in a modern application environment where core systems are being refactored and transformed into microservices deployed on AWS, following Domain Driven Design principles. The consultant will contribute to the development of back-end services and integrations in an Agile team, working closely with front-end developers, business analysts, DevOps engineers, testers, a Product Owner and a Scrum Master. The consultant will be responsible for: Developing and maintaining back-end applications and integration services in C#/.NET. Translating business requirements and user stories into technical solutions. Designing and implementing APIs and back-end services. Contributing to the refactoring of existing core systems towards a microservices architecture. Working on customer onboarding, personal data and access management features. Participating in Agile ceremonies, sprint planning, estimations and delivery activities. Ensuring clean, maintainable and tested code. 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