A jQuery developer uses the jQuery library to simplify HTML document traversal, event handling, animation, and AJAX interactions for rapid web development. They design, implement, and manage web applications, focusing on user interface features, site functionality, and the overall user experience. They also debug and troubleshoot software to ensure seamless operations. Their role involves collaborating with other developers and stakeholders to create a user-friendly website. They also ensure the website is responsive and compatible across different browsers and devices. They may also be responsible for maintaining and updating the website as needed.