Starting with user roles, key scenarios, and the data model is how web app development begins. A solid MVP emphasizes essential flows, intuitive navigation, and consistent UI components, enabling rapid delivery without turning the product into a fragile patchwork of one-off screens.

Once launched, performance, reliability, and scalability take center stage: budgets for speed, caching strategies, robust authentication, and clean API contracts. With solid monitoring, CI/CD practices, and a thoughtful architecture, teams can iterate quickly while keeping the codebase stable as features and traffic grow.