Web application development starts with defining user roles, key scenarios, and the data model. A solid MVP focuses on core flows, clear navigation, and predictable UI components, so the product can ship quickly without turning into a fragile set of one-off screens.

After launch, scalability and reliability matter most: performance budgets, caching, secure authentication, and clean API contracts. With proper monitoring, CI/CD, and thoughtful architecture, teams can iterate faster while keeping the codebase stable as features and traffic grow.