An AJAX Frameworks developer designs and implements web applications using AJAX (Asynchronous JavaScript and XML) technology. They use AJAX to enable asynchronous web development, allowing parts of a web page to update without needing to reload the entire page, improving user experience. They often work with other web technologies like HTML, CSS, and JavaScript, and may also use AJAX frameworks like jQuery, AngularJS, or ASP.NET AJAX. They develop interactive features, troubleshoot issues, and optimize applications for speed and scalability. Additionally, they collaborate with other team members to integrate their work into larger projects.