When creating a new version of the online store for the Metler brand, we focused on making it based on a modern and fully customized graphic design. Importantly, while working on the graphic design of the store, we implemented mockup based on UX research - the design built in this way was enriched with complete responsiveness, so that it works perfectly on smartphones and tablets, as well as on desktop and laptop computers. The result of our work is a perfectly readable, intuitive and stable site, which is characterized by high functionality. Of course, not without significance here is the update of PrestaShop software to the latest version, preserving all data in the store. Also noteworthy are the features useful for end customers, such as an expanded filtering module or implemented individual shopping cart making the shopping process extremely intuitive. While designing the site, we also configured the server in such a way that it could perfectly handle the traffic of Internet users and provide the highest performance for the site.