A Python and React developer works on building full-stack web applications by combining Python’s back-end capabilities with React’s front-end functionality. Python, often used with frameworks like Django or Flask, serves as the back-end, handling server-side logic, data processing, API development, and managing database operations. It provides a reliable, scalable foundation for handling complex business logic and data interactions. React, a JavaScript library, is employed on the front-end to create dynamic, user-friendly interfaces. It allows developers to build responsive and interactive user interfaces with reusable components, ensuring smooth and efficient user experiences. By integrating Python for back-end services and React for the front-end, this combination enables developers to create seamless, high-performance web applications that are both scalable and maintainable. The duo allows for efficient real-time data handling, making it ideal for modern applications that require rapid updates, such as social platforms, e-commerce sites, and dashboards.