The interview process typically starts with an initial screening call with a recruiter to discuss background, experience, and role fit. This is followed by one or more technical interviews, which may include coding challenges, system design questions, or reviewing past projects. The final stage often involves interviews with team members or managers to assess collaboration, communication, and cultural fit. Some companies may also include a take-home assignment or live coding session. How would you optimize a slow-loading React application? What they are testing: Your knowledge of performance techniques such as code splitting, memoization, lazy loading, virtualization, and efficient state management.