Youri worked on the Klantinteractie-Servicesysteem/KISS-frontend and Interne-Taak-Afhandeling/ITA repositories, delivering features that improved data retrieval, API integration, and test reliability. He implemented cross-identifier search and role-based filtering for case data, enabling more accurate and efficient customer interactions. Using TypeScript, C#, and Vue.js, Youri refactored backend and frontend components to support concurrent data fetching, robust error handling, and end-to-end testing. His work included enhancing email notification logic, streamlining configuration management, and improving CI/CD pipelines. These engineering efforts resulted in cleaner codebases, reduced manual reconciliation, and more maintainable systems, demonstrating depth in both architectural design and implementation.