This guide is tailored for senior software engineers preparing for React interviews.It covers essential React fundamentals such as JSX, Virtual DOM, components, props, event handling, and lifecycle methods.Advanced concepts like hooks, context API, error boundaries, React portals, and state management strategies are discussed.Performance optimization techniques, routing, form validation, testing, TypeScript integration, and component design patterns are highlighted.App architecture, scalability, security best practices, server-side rendering, deployment, integration, accessibility, and internationalization are essential topics.Soft skills like leadership, mentorship, code reviews, architectural decisions, and collaboration are emphasized for senior roles.The guide aims to prepare candidates with a holistic view of React, beyond basic concepts, for successful senior React interviews.It stresses the importance of practical experience in mastering these topics for interview success.Several aspects like soft skills, performance optimization, and leadership are crucial for senior software engineering roles.The roadmap provided in this guide can be a valuable resource for excelling in senior-level React interviews.For additional formats like a handwritten iPad roadmap, mind map, or PDF checklist, the author offers to convert the content upon request.