During May 2025, Diego Mondragón developed a multi-channel notification system for the SwEng2-2025i/MJ7h repository, leveraging Python, Flask, and REST API principles. He applied the Chain of Responsibility design pattern to enable users to register preferred notification channels, with automatic fallback to alternatives, and integrated centralized logging and Swagger documentation to enhance observability and API accessibility. Additionally, Diego improved repository hygiene by removing a stale subproject dependency reference in laboratory_1, reducing build fragility. His work demonstrated a strong grasp of backend development and design patterns, delivering both robust communication features and maintainable, cleaner project infrastructure within a short timeframe.