Building a web application begins by outlining user roles, main use cases, and the data structure. A robust MVP concentrates on essential paths, intuitive navigation, and consistent UI elements, enabling a launchable product that doesn't become a fragile collection of ad hoc screens.

Post-launch, scalability and dependability take priority: performance budgets, caching strategies, secure login, and well-defined API contracts. With solid monitoring, CI/CD pipelines, and deliberate architecture, teams can move faster while preserving codebase stability as features and traffic expand.