A MockFlow developer is responsible for creating wireframes, prototypes, and UI designs for software applications using the MockFlow design suite. They work closely with project managers, UX/UI designers, and developers to visualize and conceptualize the user interface. They facilitate brainstorming sessions and design reviews, using MockFlow to illustrate their ideas. They also use this tool to test and revise designs based on user feedback, ensuring the final product delivers a seamless user experience. Furthermore, they may also create design specifications and guidelines for development teams to follow during the coding phase.