Worked on the plone/plone.restapi repository to deliver a centralized integer parsing utility that standardizes error handling for invalid integer inputs across multiple backend services. By introducing a shared parse_int function and unifying the mapping of invalid integers to BadRequest responses, the developer improved API reliability and log clarity for batching, navigation, discussion, and querystring endpoints. This approach reduced noisy ValueError exceptions and streamlined client debugging. The work focused on Python and API development, with an emphasis on robust error handling. The changes addressed edge cases and expanded BadRequest coverage, enhancing both developer experience and the maintainability of backend services.