Application Architect
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What you will do
A Belgian public-sector organisation is modernising a legacy application with over 150,000 lines of code and around 20 modules to a future-proof low-code platform. The application supports case management, data processing and reporting. The modernisation will use innovative and automated migration methodologies, including artificial intelligence, code analysis and model-driven development, to maximise efficiency and quality.
As Application Architect / Technical Lead, you will be responsible for:
- Designing the technical architecture of the solution
- Reviewing AI-generated Mendix components
- Establishing development standards
- Conducting code reviews
- Providing technical coaching to the development team
- Designing integration architecture and security
The project is structured in three phases spread over three budget years. Each phase delivers a standalone deliverable that can be used independently of future phases. Each phase is ordered separately.
What we are looking for
- Expert-level application architecture skills
- Confirmed experience with Mendix development
- Confirmed experience with enterprise applications
- Confirmed experience with Agile / Scrum
- Junior-level experience with low-code architectures
- Junior-level experience with AI-assisted development
- Junior-level experience with application, process and data migration to new platforms
- Active knowledge of Dutch, French and English
All required certificates and documents must be submitted with your CV and must be verifiable.
The setting
This assignment runs for 25 months from December 2026 to the end of December 2028, part-time (2/5). The role is hybrid, based in Brussels. The actual start and number of days depend on budget approval.
You will work as part of a multidisciplinary team on a time-and-material basis. If the actual duration exceeds the estimated timeline, remaining work may be subject to a possible extension.
Location: Brussels, hybrid
Work address: Belgium
Employer / contracting party: HumanInTech
Applications close (Brussels time): October 21, 2026 at 2:00 AM
Engagement: Freelance or employed by HumanInTech
Working hours: Full-time
Experience: 6–10 years or more
Education: Bachelor's or more
Published: October 2026
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