Jaime Lozano developed and enhanced event management systems for the RaceHub repositories, focusing on both trail running and cycling domains. He implemented robust participant and event management features, enabling detailed editing and creation workflows while ensuring data integrity and scalability. Using PHP, Symfony, and Twig, Jaime refactored authentication logic to improve registration and login reliability, and introduced comprehensive form handling and database updates for participant records. His work included building new administrative interfaces and refining frontend elements with HTML and CSS, resulting in more maintainable and user-friendly event management tools. The depth of his contributions addressed both workflow and reliability challenges.