Worked on stabilizing API behavior in the Apicurio/apicurio-registry repository by addressing a critical issue with group sorting direction. Focused on backend development using Java, the developer implemented a targeted bug fix in GroupsResourceImpl.java to ensure that group listings maintain a consistent and predictable order when an order parameter is specified. This change improved data consistency and reduced user confusion, directly enhancing the reliability of client applications interacting with the registry. The work demonstrated disciplined problem-solving and attention to detail, contributing to the overall stability of the API without introducing new features, and showcased strong skills in Java backend engineering.