Senior PowerBuilder Developer

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Senior PowerBuilder Developer
Technical leadership and application modernisation
Brussels * Hybrid * 3 days on site per week
Contract options: permanent, fixed-term or freelance | Start: as soon as possible
About the role
Help shape the next chapter of a business-critical application . You will combine hands-on PowerBuilder development and production support with technical leadership , preparing an established client/server platform for a progressive transition to Java and Angular.
The role connects existing application knowledge with future development: understanding how the system works, making its business rules explicit and helping developers carry them into the new platform.
Your responsibilities
Resolve complex PowerBuilder issues and share production maintenance duties, following agreed support and documentation practices.
Analyse application components and dependencies, including PBLs, PowerScript, PFC, DataWindows and DataStores.
Identify business rules, edge cases and redundant behaviour; separate functional requirements from interface logic and historical workarounds.
Decouple business logic from GUI controls and database access, including embedded SQL, dynamic SQL and stored procedures.
Work with analysts and business specialists to translate existing behaviour into clear functional and technical specifications.
Collaborate with Java/Angular developers on REST API contracts and validate regression coverage through characterisation and Golden Master tests.
Build shared technical documentation, mentor colleagues and use static analysis and AI-assisted tools to maintain traceability between code and specifications.

What you bring
At least 5 years of hands-on PowerBuilder development , with strong expertise in the PowerBuilder 8-2022 / Appeon environment.
Advanced PowerScript and PFC knowledge : events, functions, structures, transaction handling (SQLCA, COMMIT, ROLLBACK), complex DataWindows (Composite, Group, Nested), expressions (Describe, Modify, Evaluate) and DataStores.
Strong relational database and SQL skills , including transactional SQL, PL/SQL stored procedures and query optimisation.
Understanding of stateless REST APIs, microservices, Spring Boot, Angular and JSON DTOs . Practical Java/Spring Boot and/or Angular experience, or a strong aptitude and willingness to develop these skills.
An analytical approach, clear documentation for non-PowerBuilder developers and confident communication with business stakeholders, management and technical teams.
French or Dutch, together with professional fluency in English.
Why consider this role
A hands-on technical lead opportunity combining production continuity, knowledge sharing and modernisation. Contribute to team development while building on your PowerBuilder expertise and expanding your involvement in Java and Angular.

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