Good UX has always been one of the key factors for success in the contemporary web development and there fore has led to huge improvements in our industry in the last years. Nowadays the UX of a software product is not responsibility only of the UX Architects / Producers, but to each individual involved in the creation of an app or a website, including the Front-end developers. The talk presents a summarized list of DOs and DON’Ts, which Stoyan and his team believe should be respected by the Front-end developers if they want to build a useable web product, up to and above industry standards. There will be a lot of case studies and actual examples taken from Despark’s experience in the field.