Fullstack .NET Developer

Fullstack .NET Developer - 5 months - Brussels, Belgium

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About the Role

RELYzIT Talent is seeking an experienced Fullstack .NET Developer for a high-impact freelance assignment with our client in Brussels. You’ll join a dynamic, bilingual IT department, collaborating with multidisciplinary teams to deliver robust, scalable solutions that directly shape the digital future of a major organization. This is your opportunity to drive meaningful change, working alongside elite builders in a culture that values ownership, innovation, and continuous improvement.

Why This Role Matters

Our client’s IT landscape is evolving rapidly, and your expertise will be pivotal in delivering mission-critical applications that empower both internal teams and end-users. As a Fullstack .NET Developer, you’ll help solve complex business challenges, ensure the reliability and performance of essential systems, and contribute to a culture of technical excellence. Your work will directly impact the organization’s ability to innovate, adapt, and deliver value at scale.

Key Responsibilities

• Design, develop, and maintain .NET applications using C# and .NET Core, ensuring high performance and scalability.
• Translate functional analyses into technical solutions, collaborating closely with business analysts to validate technical specifications.
• Analyze and resolve technical issues, including second-level incident resolution and providing technical support to colleagues.
• Drive continuous improvement in development processes and software quality by monitoring industry trends and adopting best practices.
• Implement automation and continuous integration using Azure DevOps pipelines and unit testing to maintain stable development, test, and production environments.
• Collaborate within agile, multidisciplinary teams (Scrum/SAFe), working iteratively with developers, testers, business analysts, Product Owners, and Scrum Masters.
• Contribute to technical documentation and knowledge sharing, preparing and reviewing documentation to support team learning and onboarding.
• Champion a builder-first mindset, proactively identifying opportunities for innovation and process optimization.

Technical Skills

• Confirmed expertise in .NET Framework and C#
• Proficient in .NET Core for backend and frontend development
• Experience with Azure Cloud and CI/CD pipelines in Azure DevOps (junior level acceptable)
• Familiarity with Blazor for frontend development (junior level acceptable)
• Understanding of gRPC Remote Procedure Calls (junior level acceptable)
• Experience with NServiceBus or similar messaging patterns (junior level acceptable)
• REST API development (junior level acceptable)
• SQL database development and optimization (junior level acceptable)

Language Proficiency

• Fluency in either French or Dutch is required
• Elementary understanding and ability to communicate in the second national language (French or Dutch)
• Good understanding of English

Other Requirements

• Bachelor’s or Master’s degree in Computer Science, or equivalent professional experience
• Minimum 8 years of experience as a .NET Developer
• At least 3 years of experience working in Agile/Scrum environments
• Strong problem-solving and analytical skills
• Mindset focused on continuous learning and improvement
• Excellent communication skills, able to explain technical concepts to both technical and non-technical stakeholders
• Collaboration-oriented, socially skilled, and adaptable to changing priorities
• Proactive, autonomous, and customer-oriented with a strong sense of responsibility

Work Arrangement

• Freelance position with a 5-month project duration
• Hybrid work: 2 days per week onsite in Brussels, 3 days remote
• Engage with a bilingual, multicultural team in a high-impact environment

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Ready to build the future with RELYzIT Talent? Upload your CV now and join a community where elite builders shape what’s next.