An HTTP developer designs, develops, and maintains applications that communicate over the HTTP protocol. Their work involves understanding and implementing web standards, ensuring secure data transfer, and managing session information across requests. They often work with RESTful APIs, which use HTTP methods like GET, POST, and DELETE to perform operations. They also handle HTTP responses and status codes, manage cookies and sessions, and implement security protocols. Their goal is to facilitate smooth, efficient communication between clients and servers, often working closely with front-end and back-end developers to create seamless user experiences.