Developed and integrated Appstack attribution support into the RevenueCat/purchases-android repository, enabling Android developers to leverage attribution data for improved targeting and real-time offerings synchronization. The work involved designing a new public API in Kotlin to ingest Appstack attribution parameters, mapping them to subscriber attributes—including a reserved identifier—and triggering synchronized updates across core flows. Integrated changes spanned key components such as PurchasesOrchestrator and SubscriberAttributesManager, with comprehensive unit testing to validate attribute mapping, edge cases, and coroutine behavior. This addition streamlined attribution-driven targeting, reduced integration friction, and ensured robust, well-tested functionality using Android development and API integration skills.