Application Developer – PowerBuilder & .NET (Hybrid, Brussels)

About the role

This position focuses on the support, maintenance and continuous improvement of legacy applications built with PowerBuilder, ASP.NET and SQL. The role ensures stability, security and sustainability of the software while working in a hybrid environment (2 days onsite in Brussels).

Key responsibilities

• Perform corrective and evolutionary maintenance of legacy applications.
• Handle production incidents, troubleshoot and apply fixes.
• Develop small enhancements and functional adaptations.
• Collaborate closely with functional analysts and follow client‑defined methodologies and standards.
• Conduct technical analysis, identify risks and optimise performance.
• Support the gradual modernisation of applications.

Required profile

• Proficiency in French, English and Dutch.
• Experience with legacy systems, especially PowerBuilder‑based applications.
• Ability to work in a hybrid setting and coordinate with cross‑functional teams.

Required skills

• .NET
• PowerBuilder
• ASP
• SQL
• PL/SQL
• SAP SQLCA
• Windows Services
• Architecture design
• Distribution Service