Full stack developer (Freelance) - 12 Months - Antwerp

At RELYzIT Talent, we don’t recruit — we build.

We unite the top 2% of builders — engineers, architects, creators — into a movement across Europe and the GCC.

Vetted through our VECTOR7™ Signal Stack, you’re not just hired, you’re chosen.

This is more than work. This is where builders build the future.

About the Role

We are seeking a Senior Full Stack Developer for a freelance assignment with our client, driving innovation in both public and private sector projects. You’ll join a dynamic team of forward-thinking engineers, leveraging Microsoft Azure, .NET Core, and modern front-end frameworks to deliver scalable, secure, and high-performance solutions. This is your opportunity to shape impactful digital products and lead the way in cloud and AI-driven development.

Why This Role Matters

As a Full Stack Developer, you will be instrumental in building mission-critical applications that power digital transformation for our client. Your expertise will directly influence the quality, security, and scalability of solutions used by thousands. This is a high-impact role where your technical leadership and creativity will help solve complex business challenges and set new standards for excellence.

Key Responsibilities

• Design and develop end-to-end solutions using .NET Core, C#, React.js, Angular, and Azure.
• Architect and implement RESTful and WebSocket APIs, as well as microservices.
• Integrate third-party SDKs and cloud components into robust applications.
• Build and maintain CI/CD pipelines using Azure DevOps or GitHub Actions.
• Embed AI components into existing and new applications.
• Write comprehensive unit, integration, and end-to-end tests with XUnit, Moq, and Selenium.
• Lead and coach development teams, fostering a collaborative and high-performance environment.
• Work in Agile/Scrum teams, collaborating closely with developers, testers, and stakeholders.
• Ensure code quality, security, and maintainability through best practices and clean code principles.

Technical Skills

• Minimum 6 years of experience in software development with Microsoft .NET.
• Deep expertise in C#, ASP.NET Core, Entity Framework, and LINQ.
• Strong hands-on experience with React.js, Angular, TypeScript, HTML5, and CSS3.
• Proven experience with Microsoft Azure, Docker, and SQL Server.
• Solid understanding of relational databases: SQL Server, PostgreSQL, Entity Framework Core.
• Experience with Python and Bash scripting.
• Demonstrated ability to set up and test RESTful APIs, microservices, and integrations in containerized environments (Docker, Kubernetes).
• CI/CD pipeline management with Azure DevOps or GitHub Actions.
• Passion for AI, design patterns, and clean code.

Other Requirements

• Bachelor’s or Master’s degree in Software Engineering or equivalent experience.
• Demonstrated experience leading development teams and coaching developers.
• Proven ability to execute programming assignments efficiently: coding, testing, debugging.
• Strong knowledge and experience with Agile methodologies, including taking on a leadership role.
• Ability to sign and comply with IT-Code and NDA (documents required upon application).
• Freelance contract: 12 months, with possible extension.
• Remote/hybrid work options available.
• Full-time engagement (100%).

Language Proficiency

• Fluency in Dutch at European CEFR level C2 is required.

What We Offer

• Challenging freelance role on innovative software projects with real-world impact.
• Opportunities for growth and access to training in Azure and AI.
• A culture where quality, autonomy, and innovation are at the core.
• Be part of a builder-first community, vetted through our VECTOR7™ Signal Stack.

Ready to build the future with us? Upload your CV now and join the movement of elite builders at RELYzIT Talent.

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