Fullstack .NET Developer

Fullstack .NET Developer - 3 months - Brussels Belgium

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Intro

Join RELYzIT Talent as a Fullstack .NET Developer and help shape the digital backbone of our client’s mission-critical systems. This freelance opportunity places you at the heart of a high-performing, bilingual IT department, where your expertise will directly impact the evolution of robust, scalable applications. If you’re ready to build solutions that matter, this is your stage.

Why This Role Matters

Our client’s IT landscape is complex, dynamic, and essential to business continuity. As a Fullstack .NET Developer, you’ll be instrumental in delivering high-quality, high-impact software that empowers teams and drives organizational agility. Your work will ensure seamless user experiences, operational excellence, and future-ready digital products in a fast-paced, agile environment.

What You’ll Be Doing

• Designing, developing, and maintaining .NET applications using C# and .NET Core, ensuring performance and scalability.
• Translating functional analyses into robust technical solutions, collaborating closely with business analysts to validate technical specifications.
• Analyzing and resolving complex technical issues, providing second-level bug fixes and technical support to your peers.
• Driving continuous improvement by adopting new technologies, methodologies, and best practices in software development.
• Automating and optimizing development workflows, including setting up CI/CD pipelines and implementing unit tests for stable environments.
• Collaborating within a multidisciplinary agile team (Scrum/SAFe), working iteratively with developers, testers, business analysts, product owners, and scrum masters.
• Contributing to and reviewing technical documentation, sharing knowledge, and mentoring junior developers within the team.

What We’re Looking For

• Ownership mentality: You take initiative, drive outcomes, and thrive in environments where your impact is visible.
• Problem-solving prowess: You approach challenges analytically and creatively, always seeking the best solution.
• Continuous learner: You stay ahead of the curve, embracing new technologies and methodologies.
• Strong communicator: You can clearly explain technical concepts to both technical and non-technical stakeholders.
• Collaboration-first mindset: You work seamlessly in diverse, multidisciplinary teams and value knowledge sharing.
• Adaptable and flexible: You handle shifting priorities and unexpected changes with ease.
• Proactive and autonomous: You take responsibility and deliver results independently.
• Customer-oriented: You understand the end-user perspective and build with their needs in mind.

Technical Skills

• Confirmed expertise in .NET Framework and C#
• Experience with .NET Core for backend and frontend development
• Junior-level experience with Azure Cloud, Azure DevOps, and CI/CD pipelines
• Familiarity with Blazor for frontend development (junior level)
• Basic knowledge of gRPC (Remote Procedure Calls)
• Experience with MS SQL (junior level)
• Understanding of messaging patterns such as NServiceBus (junior level)
• Basic experience with Windows Communication Foundation (WCF)
• Knowledge of Oracle PL/SQL is a plus

Language Proficiency

• Fluency in either French or Dutch (spoken and written)
• Working knowledge of the second language (elementary written and oral communication)
• Understanding of English

Other Requirements

• Bachelor’s or Master’s degree in Computer Science or equivalent experience
• Minimum 5 years of experience as a .NET Developer
• At least 3 years of experience working in Agile/Scrum environments
• Experience working in multidisciplinary, bilingual teams is an advantage
• Availability for a 5-day work week, with at least 2 days onsite in Brussels
• Partial remote work possible
• Freelance position for an initial 3-month engagement

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