Worked on the gardener-extension-provider-openstack repository to improve backend reliability and developer experience by refining the FindExisting API. Focused on simplifying the API surface, the work involved removing an unused 'filter' parameter and enhancing error handling to provide clearer diagnostic messages. Instead of displaying raw memory addresses, the updated error now reports the count and name of items when multiple matches occur, streamlining troubleshooting and integration. These changes were implemented using Go and leveraged skills in backend development, error handling, and refactoring. The work was tracked through Git-based collaboration, ensuring traceability and facilitating code review within the project’s workflow.