User Interface Engineering (UIE) focuses on designing and improving the interfaces through which users interact with software and digital products. This field combines principles from design, psychology, and technology to create intuitive and efficient user experiences. UIE aims to make applications easy to navigate, visually appealing, and responsive to user needs. Professionals in UIE often conduct user research, create wireframes, and test prototypes to ensure that the final product meets user expectations. They work closely with User Experience Designers, Software Developers, and Product Managers to align the interface with overall project goals and enhance usability.