Know the fundamentals deeply
A strong React interview starts with JSX, props, state, lifecycle patterns, and how React re-renders. Be ready to explain when to use local state, prop drilling, lifting state up, context, and custom hooks without copying a memorized answer.
Practice component design
Employers often ask how you would structure a dashboard, a reusable form, a modal flow, or a product page. Your answer should show separation of concerns, clear props, accessible UI, and scalable state management. Good component design is usually more important than fancy animation.
Understand performance and bugs
Be able to talk about memoization, rendering bottlenecks, stale state, API race conditions, and how to debug a broken UI. Good candidates explain the problem, reproduce it, and reason about the fix instead of jumping to random optimizations.
Show product thinking
Interviewers want to know whether you can design interfaces that are simple, fast, and understandable. Explain why a feature matters to a user, how it fits the product flow, and how you would test edge cases before release.