During June 2025, Xavier B. developed federated group sharing capabilities for the nextcloud/android and nextcloud/android-library repositories, enabling users to share files and resources with federated groups across organizational boundaries. He designed and integrated new data models and UI components in Kotlin and Java, ensuring seamless support for the new share type throughout the mobile application. His work included backend API integration and remote group data handling, establishing end-to-end workflows for federated collaboration. By focusing on both core logic and user experience, Xavier delivered a robust foundation for federation-oriented governance, demonstrating depth in Android development and cross-repository feature implementation.