React developer is a programmer who has a complete understanding of the framework and understands how to work with it. Advanced React developer implements complex web component solutions using React JS and knows at least one adaptive back-end framework (e.g. Node JS).
Despite the fact that React JS is a front-end framework, a programmer needs basic skills to implement functionality on a website/application. That is, the react developer is a kind of full stack developer with an emphasis on component implementation.