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Important information
Contract type:
Freelance
Daily rate:
Salary according to profile
Location:
Brussels, Belgium
Starting date:
Urgent
Work mode:
Onsite
Published on:
22 May 2026
What they need
You will join our Technology Team, a cross-functional team responsible for driving technology evolution and modernization initiatives across the organization. As part of this team, you will contribute to the migration of our existing PHP-based intranet toward a modern architecture based on:
• Backend For Frontend (BFF) in Node.js
• Backend services in .NET
• Frontend applications in Mendix
You will collaborate closely with frontend and backend developers, business analysts, testers, and architects to design, implement, and deliver scalable solutions.
Responsibilities:
• Participate in the modernization and migration of legacy applications
• Design and implement new technical solutions aligned with the target architecture
• Contribute to backend, frontend, and integration developments
• Collaborate with technical and functional stakeholders
• Participate in Agile ceremonies and sprint planning
• Estimate, develop, test, and deliver features within iterative delivery cycles
• Contribute to technical discussions, best practices, and continuous improvement initiatives
• Help improve application maintainability, scalability, and overall technical quality
Profile wanted
• Minimum 5 years of experience in software development and integration services
• Senior-level experience with PHP and legacy application modernization
• Strong experience with Node.js development, ideally in a Backend For Frontend (BFF) architecture
• Good knowledge of .NET / C# and modern backend development practices
• Experience designing and implementing APIs and integration services (REST and/or gRPC)
• Familiarity with OpenAPI / Swagger specifications
• Experience with relational databases such as MSSQL or MySQL
• Good understanding of object-oriented design principles and clean architecture practices
• Experience with ORM frameworks such as Entity Framework or NHibernate
• Familiarity with unit testing and mocking frameworks
• Experience with source control management tools (Git preferred)
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