Starting with defining user roles, essential scenarios, and the data model sets the stage for web app development. A solid MVP emphasizes main flows, intuitive navigation, and consistent UI elements, enabling rapid delivery without becoming a brittle collection of ad hoc screens.

Post-launch, scalability and reliability are the top priorities: performance budgets, caching, secure authentication, and clean API contracts. With proper monitoring, continuous integration and deployment, and deliberate architecture, teams can iterate faster while preserving codebase stability as features and traffic expand.