An CSS developer specializes in designing and implementing web interfaces using and CSS technologies. They create and enhance website layouts, user interfaces, and web applications, ensuring they are responsive, user-friendly, and visually appealing. They work with other developers to integrate the front-end elements with the server-side logic. Their responsibilities also include creating technical specifications, testing for usability and fixing bugs. They are expected to stay updated with the latest trends and best practices in web development. They often work closely with graphic designers to create an overall visual identity for a website or application.