React.js jobs focus on programming. In this type of role, your responsibilities may involve coding a user interface for an application, determining any back-end requirements, building additional software as needed, and assessing whether or not the React.js library is suitable for your task. Most React.js jobs do not focus exclusively on this programming language; instead, it is usually used as one part of a programming job. Employers may also ask you to use Java, NetCore, Node.js, NoSQL, Perl, Python, or other programming languages as needed. Your duties may also include helping analyze and design application interfaces, transforming specified design goals into programming objectives, and creating documentation or teaching others how to use your interface.