Carlo Sobrepeña contributed to kredo-school’s 27th_yourchoice and 30th_hop-quest repositories, focusing on backend and full stack development using Laravel, PHP, and JavaScript. He reintroduced and streamlined database seeding for hotel categories, enabling faster test environment setup and reducing onboarding time for QA. In 30th_hop-quest, Carlo addressed technical debt by cleaning up outdated migrations and simplifying deployment configuration, which improved reliability and maintainability. He enhanced the frontend asset pipeline with new Vite entry points for user profiles and quest management, expanding feature coverage. His work demonstrated a methodical approach to codebase hygiene, deployment, and feature delivery within a short timeframe.