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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend .NET Developer - **Company:** Keystone Solutions - **Location:** Brussel, Belgium - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** ASP.NET, .NET Framework, Agile Methodology, ASP.NET MVC Framework, Unit Testing, Microsoft Azure, Business Process Model and Notation, Business Software, Code Review, Software Design Patterns, Entity Framework, Windows Communication Foundation, JSON, Microsoft Visual Studio, Microsoft SQL Server, Model View Controller (MVC), Object-Oriented Software Development, Oracle Databases, Scrum Methodology, UML, Web Services, Extensible Markup Language (XML), .NET Core, Wcf Rest, Backend, Git, Solid Principles, Webforms, Redgate, Restful APIs, Web Api - **Published:** September 5, 2026 - **Apply:** https://www.adzuna.be/details/5871635274 ## About the Role * Ability to analyze functional requirements and translate them into technical solutions in collaboration with the scrum team and solution architect. * Ability to develop maintainable, high-performance code that adheres to team development standards. * Experience in corrective and evolutionary maintenance of existing applications. * Knowledge of SOLID principles and best practices in object-oriented development. * Experience in writing and executing unit tests. * Ability to diagnose and resolve technical incidents. * Participate in code reviews and continuous improvement initiatives. * Experience working in an Agile (Scrum) environment. Expected Qualities: * Autonomy in carrying out assigned developments. * Analytical and problem-solving mindset. * Ability to collaborate effectively with analysts, architects, and other developers. * Strong communication skills and a team-oriented approach. * Rigorous, proactive, and quality-oriented. As a consultant at Keystone Solutions, you will experience turbo-charged learning opportunities and a commitment to career growth within our framework. Being a If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal., * .Net - Level: Expert - Most recent: This year * .NET Core - Level: Expert - Most recent: This year * Agile - Level: Expert - Most recent: Any time * ASP.NET - Level: Confirmed - Most recent: 1 to 3 years ago * ASP.NET MVC - Level: Confirmed - Most recent: 1 to 3 years ago * Azure DevOps - Level: Expert - Most recent: This year * Entity Framework Core - Level: Expert - Most recent: This year * GIT - Level: Expert - Most recent: 1 to 3 years ago * JSON - Level: Expert - Most recent: This year * RESTful API - Level: Expert - Most recent: 1 to 3 years ago * Scrum - Level: Expert - Most recent: This year * Soap API - Level: Nice to have - Most recent: Any time * SOLID - Level: Expert - Most recent: This year * Sprint - Level: Expert - Most recent: Any time * UML - Level: Nice to have - Most recent: Any time * Visual Studio - Level: Expert - Most recent: 1 to 3 years ago * XML - Level: Expert - Most recent: Any time ## Description Keystone Solutions is seeking a Senior Backend .NET Developer for a consultancy mission at a client site. In this role, you will be responsible for the development of core business applications, working on dynamic projects that offer a variety of challenges across different client environments., * Understand and interpret UML and BPMN models. * Manage and utilize SQL Server databases from version 2016 to 2025. * Manage and utilize Oracle databases from version 19. * Apply design patterns based on architect recommendations. * Develop REST services using .NET Framework and .NET 8 and above. * Develop interfaces in ASP.NET WebForms / MVC, .NET 4.5 and above. * Work with XML and JSON. * Utilize W3C standards. * Work with WebAPI, WCF REST, WCF, and Web Services. * Utilize Azure DevOps with GIT and TFVC. * Practical knowledge of Redgate tools is a plus. * Utilize Entity Framework Core. ## Related Videos - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [ChatGPT and Java: A Match Made in Heaven or Hell?](https://www.wearedevelopers.com/videos/536-chatgpt-and-java-a-match-made-in-heaven-or-hell) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [Beyond UML: Making Sense of AI-Generated Code through Visual Architecture](https://www.wearedevelopers.com/videos/2102-beyond-uml-making-sense-of-ai-generated-code-through-visual-architecture) ## Related Articles - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs) - [Backend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/196-backend-developer-salary-in-germany-2023) - [Frontend Developer Salary in Germany [2023]](https://www.wearedevelopers.com/magazine/195-frontend-developer-salary-in-germany-2023) - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers)