How do you design a maintainable large-scale Xamarin app architecture?

Large-scale Xamarin apps use modular MVVM, clean architecture, dependency injection, and feature-based separation.

Maintainable architecture in Xamarin requires strict separation of concerns. Apps are divided into feature modules (Auth, Payments, Catalog). Each module follows MVVM with independent services and ViewModels. Clean Architecture ensures domain logic is isolated from UI and infrastructure. DI containers manage dependencies, while shared libraries handle cross-cutting concerns like logging and networking.