As part of Česká spořitelna's open banking initiative, we participated in the development of the Dohodnuto.cz platform – a solution for secure online trading. The system acts as a neutral intermediary between buyer and seller: the bank manages a temporary account where the buyer sends payment, releasing it only after the transaction is successfully completed. Our task was to create the frontend part of the platform and a clear user interface that guides users through the entire process. In collaboration with Česká spořitelna's internal team, we created a flexible solution that can function as a plugin across various online marketplaces.