MERN Stack is a combination of development technologies, including MongoDB, Express.js, React.js, and Node.js. This technological stack is used to generate modern, efficient web development solutions, particularly full-stack web or mobile applications. If you’re looking to hire a professional with MERN Stack expertise, some of the typical tasks they could take on include building and deploying enterprise level web applications, fullstack development for client websites, creating custom user interface visuals, automating system processes with APIs, and setting up server monitoring systems.