Worked on the miw-upm/apaw-practice repository to design and document the data model for a Conference Room Booking System. Focused on defining core entities such as Room, Booking, User, and Amenity, the work established clear relationships and attributes to serve as a single source of truth for future development. Leveraged skills in data modeling, database design, and system design, using Markdown for documentation and Mermaid to create a class diagram that aids both technical reviews and stakeholder communication. This foundational documentation supports safer implementation, easier integration, and accelerates onboarding for subsequent development phases, reflecting a thorough and methodical engineering approach.