Building a web app begins with defining user roles, key use cases, and the data model. A strong MVP concentrates on essential flows, intuitive navigation, and consistent UI elements, so the product can ship rapidly without becoming a brittle collection of ad hoc screens.

Post-launch, scalability and reliability are the top concerns: performance budgets, caching strategies, secure sign-in, and clean API contracts. With proper observability, CI/CD practices, and thoughtful architecture, teams can iterate more quickly while keeping the codebase stable as features and traffic expand.