Senior Developer / Application Architect – Freelance

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Senior Developer / Application Architect (.NET & Angular) – Freelance

Antwerp, Belgium
Start: May 2026 | Duration: Until July 2027 (extension possible)

Full-time | Hybrid

About the Role

We are looking for a Senior Developer / Application Architect to join a dynamic development team working on business-critical applications.

In this role, you will act as the technical authority, shaping the architectural direction and elevating development standards. You will balance innovation with stability while contributing hands-on to the development of robust and scalable applications.

Your Responsibilities
  • Define and guide architecture decisions across backend (.NET/C#) and frontend (Angular or Blazor)
  • Act as a technical lead and mentor, coaching developers and promoting best practices
  • Develop and maintain high-quality, business-critical applications
  • Improve and optimize the software development lifecycle (tools, workflows, standards)
  • Collaborate closely with analysts, testers, and project managers
  • Drive adoption of modern technologies, including AI-assisted development
  • Ensure clean code, performance, and scalability across solutions

Your Profile

Must-Have
  • Minimum 5 years' experience in application development
  • Strong expertise in .NET / C#
  • Solid experience with Angular (or similar frontend frameworks)
  • Experience as an Application Architect or technical lead
  • Proven experience in Agile development environments
  • Experience with Atlassian tools (Jira, Confluence)
  • Strong hands-on experience in coding, testing, and debugging
  • Dutch proficiency at CEFR level C2
Nice to Have
  • Experience with Blazor
  • Knowledge of API Gateway solutions (e.g. Kong)
  • Experience with OpenShift or container platforms
  • Familiarity with AI tools in development (e.g. Claude)
  • Experience with SQL and database design
  • Experience with Bitbucket
  • Proven experience in team leadership and coaching
What's in It for You
  • Take a leading role in architectural decision-making
  • Work on impactful, business-critical applications
  • Be part of a forward-thinking team embracing innovation and AI
  • Opportunity to mentor and grow development teams
  • Flexible hybrid working model
Additional Information
  • Freelance assignment under framework agreement
  • Full-time engagement
  • Hybrid work setup
  • Long-term opportunity with possible extensions
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