Designing the UX and UI for the SELF-SERVICE app posed the challenge of simplifying the complex car buying process. We aimed to create a user-friendly experience by focusing on simplicity, transparency, and ease of use. The challenge involved streamlining the app's interface, optimizing the user flow, ensuring transparency in information, and maintaining consistency across mobile and web platforms. By addressing these challenges, we successfully created a hassle-free car-buying experience for users.