The aim of this research is to develop a user interface for a mobile banking application, emphasize key elements in the design process, and provide guidelines for achieving optimal user experience. The first part of the research will focus on the concept of mobile banking applications, exploring their evolution, functionalities, and impact on users' financial experiences. Subsequently, an in-depth analysis of banking applications available in the Republic of Croatia market will be conducted. This analysis will enable the identification of crucial strengths and weaknesses in their user interface designs and draw insights for our own development. The research will center on defining user experience and user interface design. This encompasses the investigation of UI design principles, the significance of visual hierarchy, the selection of appropriate colors, typography, and icons. The user journey phases through the application will be particularly analyzed to ensure that users easily access desired functionalities. This study will integrate the obtained analysis results to create a prototype of the user interface for the mobile banking application. Utilizing Figma, a visual representation of the interface will be developed. Through all the aforementioned steps, this work will provide guidelines and methods for crafting modern and intuitive user interfaces for mobile banking applications, contributing to an enhanced user experience and increased efficiency in financial interactions.