Worked on the symfony/symfony repository to address a bug in DoctrineBridge related to the UniqueEntity constraint’s handling of UUID-based identifiers. Focused on backend development using PHP and Symfony, the developer implemented a targeted fix ensuring that entities with the same UUID but different instances are correctly distinguished, preventing false positives during validation. The approach included creating fixture classes and expanding both unit and integration test coverage to validate the new behavior. By strengthening the reliability of entity validation and data integrity for applications using Doctrine and UUIDs, the work contributed to safer releases and more maintainable code within the Symfony ecosystem.