Senior .NET Fullstack Developer Consultant – Talent Pool

Our clients regularly look for experienced .NET developers for business-critical applications. We are building a pool of senior .NET fullstack developers we can propose quickly when a new mission opens. By joining, you will be among the first profiles we contact when a matching mission opens – as soon as a matching client request comes in.

Keystone Solutions is a Brussels-based IT consultancy and recruitment company – Bridging Technology & Talent. Organised in five practices (Management Consulting, IT Analysis, IT Development, IT Security and IT Infrastructure), we place experienced IT professionals on missions with leading organisations in Belgium, mainly in banking & insurance, federal and regional public institutions, utilities and industry.

• Development and modernisation of business applications in .NET
• API and integration development
• Cloud-native development and migration to Azure
• Agile product teams with DevOps practices

• →Design and develop applications and REST APIs in .NET / C#
• →Build front-end features with Angular or React
• →Contribute to architecture, code reviews and technical best practices
• →Work with Azure DevOps, CI/CD pipelines and automated testing
• →Collaborate with analysts, testers and product owners in Agile teams

• Minimum 5 years of hands-on experience with .NET (Core / .NET 6+) and C#
• Solid experience with SQL Server (or Oracle) and REST APIs
• Front-end experience with Angular or React
• Experience with Azure DevOps and CI/CD

• Azure cloud services; Docker / Kubernetes; microservices
• Terraform or other infrastructure-as-code
• Experience as technical lead or mentor
• Microsoft certifications (e.g. AZ-204)

• Most of our clients operate in a bilingual environment: French and/or Dutch is required for the majority of missions, with a strong preference for bilingual FR/NL profiles
• Professional English is expected in most IT environments

Missions are typically medium to long term, full-time or part-time, on site or hybrid (usually 2–3 days on site). Depending on your preference, we work with you as a Keystone Solutions employee or as a freelance/subcontractor.

• Intake call with one of our recruiters to understand your expertise, preferred environments, languages and availability
• Keystone CV: we prepare with you a client-ready CV highlighting your most relevant experience
• Fast matching: when a client publishes a matching request, we contact you first and can submit your profile quickly – often before the market
• Transparency: we never submit your profile without your explicit consent for each mission
• Regular check-ins to keep your availability and preferences up to date