Worked on preparing Magento repositories for PHP 8.4 and Adobe Commerce 2.4.8 upgrades, focusing on backend development and code compatibility. Updated magento/security-package and magento/inventory to introduce nullable type hints, enhance validation logic, and standardize licensing headers, ensuring smoother request handling and clearer license ownership. In magento/magento2-page-builder, maintained core functionality by addressing PHP 8.4 compatibility issues and improving documentation, including PHPDoc updates for the Render class. Used PHP and Magento development skills to reduce upgrade risk, clarify upgrade paths, and support long-term maintainability, with work emphasizing code documentation, maintenance, and robust compatibility across multiple repositories.