Worked on the valtimo-platform/valtimo-backend-libraries and valtimo repositories to deliver enhancements to the Catalogi API, focusing on backend reliability and automation. Developed a new get-eigenschap plugin action that retrieves property URLs and stores them as process variables, supporting both direct URL input and lookup by property name within a zaaktype. Improved exception handling by introducing specific not-found exceptions and standardizing error messages for greater clarity. Expanded unit tests to cover multiple not-found scenarios, reducing manual troubleshooting. Utilized Java and Kotlin for API development, integration, and testing, resulting in more robust workflow automation and improved system observability.