Worked on the ILIAS-eLearning/ILIAS repository to enhance the reliability of anonymous user handling within backend PHP code. Focused on refactoring the ilObjTest.php file, the developer addressed a bug by replacing direct user object access with the use of a pre-existing user_id variable, casting it to an integer to ensure type safety. This approach reduced type-related issues and improved the robustness of authentication edge cases, particularly for anonymous users. By aligning with established code patterns, the changes contributed to greater maintainability and test stability. The work demonstrated attention to backend development best practices and careful handling of authentication logic.