React front-end development begins with setting up the environment using tools like Create React App or Next.js. The UI is broken into reusable components based on the design. Components are then built with JSX and styled using CSS, Tailwind, or other tools. State is managed with React hooks or libraries like Redux, and routing is handled via react-router-dom. API integration is used to fetch and display dynamic data. Testing ensures reliability and performance and is optimized through lazy loading and memoization. Finally, the app is deployed using platforms like Vercel or Netlify for live access.