ReFine is an academic project in which I led the brand development and app design, aiming to turn second-hand commerce into a social, trustworthy, and sustainable experience. I defined the brand vision and identity, crafted a timeless visual language inspired by natural elements, and conducted user research (survey + interviews) alongside a competitive analysis. I translated these insights into an end-to-end UX flows, information architecture, and wireframes and into a modern, clean UI. I designed the key screens (social feed, smart profile, ratings, shipping, and payment) and created an interactive prototype demonstrating the user journey and value.