A KirbyCMS developer is responsible for building and managing websites using the Kirby content management system (CMS). This involves creating aesthetically pleasing and user-friendly website layouts, incorporating features such as forms, galleries, and e-commerce capabilities. They also ensure the website is responsive and optimized for various devices. Furthermore, they integrate the website with databases, handle data migration, ensure website security, and troubleshoot technical issues. They work closely with stakeholders to understand their needs and translate them into functional requirements. Continuous maintenance and updates to the website to improve performance and implement new features are also part of their duties.