Worked on a major user interface overhaul for the User Information screen in the nextcloud/android repository, focusing on scalable and maintainable data presentation. Leveraged Kotlin, Java, and XML to migrate the UI to a sectioned display using SectionedRecyclerViewAdapter, introducing a dedicated Groups section with themed titles for improved organization. Refactored the adapter into its own class, adopted data classes, and centralized item-type logic with enums to enhance type safety and readability. Emphasized immutable data handling and non-null view holders, reducing runtime mutations and potential bugs. Prioritized code quality and traceability, supporting long-term maintainability and consistent user experience.