If you are wondering what makes websites so interactive and user-friendly User interface designer isn't just paid heavy but they need to spend hours in front of a screen doing a vigorous amount of work. To create an attractive user-friendly interface. And testing it And sometimes it gets hard to work on this rising industry. UI designer needs to build a deep understanding of the customer and conduct continuous research. They need to work on the look and feel of software applications An to be a UI designer you can take the help of a mentor or you can choose to do UI designer certification.