Though the terms are related and can overlap, they are not interchangeable. There are three main differences between UI and UX developers.
(1) While UI deals with look and feel, UX deals with end-user interaction quality.
(2) UI design has an artistic component that UX does not.
(3) UI is more of a technical component for producing design features for the finished product while UX focuses on the user’s experience of navigating the app.