Airbnb is evolving into a more social platform, emphasizing community connections through Experiences. The platform prioritizes user privacy by creating a distinction between internal user data and public-facing profiles. Users have control over their profile visibility, choosing what information is shared on Experiences. To manage this, Airbnb uses unique User IDs and Profile IDs for distinct contexts, enabling flexible privacy settings. This allows users to have multiple profiles, such as host and guest profiles, kept separate when appropriate. Airbnb employs a permission system called Himeji, ensuring least-privileged access and strong data security. The implementation involved automated audits, team collaboration, and AI-assisted refactoring to ensure proper identifier usage. Type safety and rigorous testing were crucial in maintaining data integrity during the migration. Ultimately, Airbnb's privacy principles aim to balance social features with user control over personal information. This approach is designed to foster both connection and privacy within the Airbnb community. This system is in place to allow users to confidently connect and share with others.