Iceberg Pattern Proposed as Alternative to Clean Architecture for Real-Time Flutter Apps

A software developer has proposed the 'Iceberg Pattern,' a new architectural approach for Flutter applications that rely on real-time data sources such as Firebase Firestore, Supabase, or WebSockets. The pattern is presented as a solution to two common failures of traditional Clean Architecture in real-time contexts: excessive pass-through layering with little functional value, and complex, error-prone stream synchronization logic. The Iceberg Pattern separates concerns across layers with distinct lifecycles, using reactive signals beneath a 'waterline' and BLoC facades above it to handle UI rendering. Key claimed benefits include warm data caching that persists across screen navigation, optimistic mutations with automatic rollback, and fully synchronous UI rendering without StreamBuilder or FutureBuilder overhead. The pattern is implemented using a library called BlocSignal and targets enterprise-scale Flutter development where real-time cloud data is central to the application.