A HTA (HTML Application) developer is responsible for designing and developing web-based applications using HTML, CSS, and JavaScript. Their role involves creating user-friendly interfaces, testing and debugging applications, ensuring cross-browser compatibility, and integrating with backend systems. They also analyze user requirements, develop application prototypes, and perform maintenance and updates. They adhere to coding standards and follow web accessibility guidelines. They work closely with other team members, such as UI/UX designers, back-end developers, and project managers, to deliver high-quality, efficient, and scalable applications. They must keep updated with emerging web technologies and programming practices.