During May 2025, Rob Mallett refactored the alphagov/pay-connector repository by removing the deprecated NotificationCredentials feature, streamlining the backend data model and reducing technical debt. He systematically eliminated the NotificationCredentials entity throughout the Java codebase, updated the OpenAPI specification, and adjusted database migrations to reflect the new structure. This work involved careful management of data access paths and cleanup of related imports and methods, ensuring consistency and maintainability. By leveraging his skills in API design, backend development, and database management, Rob delivered a leaner, more maintainable system that aligns the API surface with current requirements and simplifies ongoing maintenance.