A system is disclosed for delivering dynamically-rendered web experiences enriched with external user profile data. The system establishes a provider connection with a provider system external to the system. The provider connection connects a page component of a network site and a provider service executing on the provider system. During web content delivery, the system accesses the provider connection and queries the provider service about a user visiting the network site. The system dynamically integrates external user profile data provided by the provider system with system-managed content in a delivered web page that is tailored to the user.