For Internet Banking services of Santander Consumer Bank we developed a concept of e-banking system, wireframes, graphic designs and implemented a front-end layer. We made sure that our solutions are effective with two rounds of usability testing (tests of project functionality and graphic designs).For Bank Zachodni WBK (Santander Group) we developed an Internet service promoting cash deposit machines. With interactive tools that we implemented, customers may easily familiarize with the functionalities of the device by learning about it step by step.