UX design is all about identifying and solving user problems; UI design is all about creating intuitive, aesthetically-pleasing, interactive interfaces. UX design usually comes first in the product development process, followed by UI.With the skeleton of the product mapped out, the UI designer steps in to bring it to life. The UI designer considers all the visual aspects of the user’s journey, including all the individual screens and touchpoints that the user might encounter, think tapping a button, scrolling down a page or swiping through an image gallery.