Marc Galang enhanced the Drupal HelFi platform by delivering targeted backend improvements across the drupal-helfi-platform-config, drupal-helfi-etusivu, and helsinki-paatokset repositories. He focused on optimizing caching for news lists, introducing dynamic max-age management and type-safe response handling in PHP to ensure efficient content rendering. Marc streamlined editorial workflows by conditionally hiding form fields using Drupal’s Form API, improving user experience for content editors. He also addressed SEO issues by refining canonical URL handling and external link presentation. His work demonstrated depth in backend development, caching strategies, and code refactoring, with comprehensive test coverage and clear documentation to support maintainability.