Building a web app begins by outlining user roles, main use cases, and the data schema. A robust MVP emphasizes essential workflows, intuitive navigation, and consistent UI elements, allowing the product to release rapidly rather than becoming a brittle collection of ad-hoc screens.

Post-launch, scale and dependability take precedence: performance budgets, caching strategies, secure sign-in, and well-defined API interfaces. With effective monitoring, continuous integration/deployment, and purposeful architecture, teams can iterate quickly while preserving a stable codebase as features and traffic expand.