Jordy Cantaert developed a new task query API filter, taskDefinitionKeyNotIn, for the camunda/camunda-bpm-platform repository, enabling clients to exclude tasks by specific definition keys. This feature required coordinated updates across OpenAPI templates, data transfer objects, query logic, and automated tests, demonstrating proficiency in API design and backend development. By leveraging Java and FreeMarker, Jordy optimized query performance and improved the precision of task retrieval, addressing the need for more flexible workflow management. The work reduced unnecessary data transfer and server load, reflecting a thoughtful approach to query optimization and a solid understanding of scalable API architecture within enterprise systems.