So, the React Native developer works on the UI components for mobile apps. Java Script is the core of React and React Native, which is why knowing JavaScript is crucial. Next, ES6 and React. It is a must to be good at these technologies as well. One more thing is the experience in developing apps using React Native. It will be a big advantage. At the same time, the need to know API services for Android and iOS, cross-platform compatibility, and the application's infrastructure for integration. Some knowledge of Redux will be useful too. Other necessary skills are writing clean code and checking it for bugs, working with existing code, and communicating with other development team members.