Building a web app begins by outlining user roles, essential use cases, and the data structure. A strong MVP emphasizes the main flows, intuitive navigation, and consistent UI elements, enabling rapid delivery without becoming a fragile collection of ad-hoc screens.

Post-launch, scalability and reliability take precedence: performance budgets, caching strategies, robust authentication, and clean API schemas. With proper observability, CI/CD practices, and well-considered architecture, teams can iterate more quickly while maintaining codebase stability as features and traffic expand.