Starting with defining user roles, key scenarios, and the data model lays the foundation for web app development. A solid MVP concentrates on essential flows, intuitive navigation, and consistent UI components, enabling the product to ship rapidly without becoming a fragile collection of ad-hoc screens.

Post-launch, scalability and reliability take center stage: performance budgets, caching, robust authentication, and clean API contracts. With effective monitoring, CI/CD, and thoughtful architecture, teams can iterate more quickly while keeping the codebase stable as features and traffic grow.