The design of e-commerce web applications greatly affects the customer. The development of online commerce for many companies provides an opportunity to expand their offerings to a much larger area. Because through e-shopping, all products can be offered to anyone who uses online services, and more and more products are becoming available to people around the world. In this way, the company expands and customers become less and less on hand. Customers are able to research the market, but do not have to come into physical contact with the products themselves. As a result, companies are more and more trying to stand out in a multitude of other offerings precisely with user interface design. This paper deals with the factors that affect the customer experience of e-commerce, and the analysis of important items for customers who say that design, information and payment are important for e-shopping. As part of this thesis, a web application was created that shows e-commerce. By launching the application, the offered products for "purchase" are displayed, which can be added to the cart and "ordered". All parts of the pages are designed using criteria and guidelines for interface design for the purpose of better user response.