During this period, contributed backend enhancements to the symfony/http-kernel and symfony/symfony repositories, focusing on improving validation flexibility in PHP applications. Developed features that allow expressions and closures to define validation groups within the #[MapRequestPayload] and #[MapQueryString] attributes, enabling more dynamic and context-aware validation logic. Leveraged advanced PHP attribute syntax and Symfony’s validation component to reduce boilerplate and support complex business rules. The work aligned with Symfony’s core expectations, streamlining developer experience for dynamic validation scenarios. Demonstrated strong skills in PHP, Symfony, and backend development, delivering two features that enhance maintainability and extensibility in validation workflows.