An HTTPWatch developer utilizes the HTTPWatch software to monitor, debug, and analyze the performance of web pages. They scrutinize HTTP, HTTPS, and other network-related issues, which helps in optimizing website performance. They're responsible for identifying bottlenecks and issues that might affect the website's loading speed or overall performance. HTTPWatch developers also use the tool to check the content, size, loading times, and other relevant details of HTTP requests and responses. They interact with APIs to automate and customize the software’s functionality, aiding in the development and enhancement of web applications.