Develop and maintain modular, reusable React components, ensuring they follow best practices for code maintainability and performance. Implement state‑management solutions (e.g., Redux, Context API) to manage application state effectively. Utilize React lifecycle methods and hooks (e.g., useState, useEffect) to manage component state and side effects. Write unit and integration tests for React components using testing libraries such as Jest and React Testing Library. Maintain and refactor legacy code written in jQuery to ensure compatibility with current codebases.