A MERN full-stack developer is responsible for both front-end and back-end web development tasks using the MERN stack technologies, which include MongoDB, Express.js, React.js, and Node.js. They maintain web applications ensuring seamless integration between client-side and server-side components.
Their role encompasses developing interactive user interfaces, implementing server-side logic, managing databases, and ensuring application security. They also collaborate with cross-functional teams, participate in code reviews, stay updated with industry trends, and contribute to continuous improvement through testing and documentation.