Worked on the DataDog/datadog-operator repository to enhance controller reliability by addressing finalizer lifecycle and reconciliation timing issues. Focused on unifying finalizer management across five controllers, the work introduced immediate requeue after finalizer addition and standardized requeue periods, which reduced reconciliation delays and improved test stability. Refactored deletion-path handling to ensure proper cleanup and removed redundant logic, aligning controller behavior with Kubernetes operator patterns. Collaborated on improving test coverage and validation for SLO-compliant reconciliation. Utilized Go for controller development and finalizer management, resulting in more maintainable code and consistent multi-controller behavior without introducing new features during the period.