A Framework Design developer creates the underlying structure for software applications. They design and implement reusable, scalable, and efficient systems that provide a basis for software development. Their tasks include defining the architecture, components, modules, interfaces, and data for a system to satisfy specified requirements. They ensure the framework facilitates software development by providing a foundation that developers can build upon. They also take into consideration performance, security, and compatibility with other systems. They often work closely with other developers to understand their needs and challenges, and to provide them with appropriate tools and solutions.