A responsive web platform where users find and trade second-hand smartphones and digital devices
Rolle is a second-hand tech marketplace that sits between buyers and sellers, handling the full transaction: listing, device verification, secure payment, and delivery. Buyers never meet sellers. Every device passes through Rolle's inspection before it ships.
As part of the Trebbble team, I was entrusted with designing this project end-to-end. Over an 8-week period, I shaped Rolle's brand identity, design system, UX research, interaction design, and full interface across mobile and desktop — from first sketch to final developer handoff. Delivered within an agile process with weekly stakeholder reviews.
The second-hand electronics market was a €124B opportunity stuck in a trust crisis. 50% of users had been scammed, 40% gave up after hours of searching for a listing they could believe in, and every major marketplace in the space had poor Trustpilot ratings. The fundamental problem wasn't supply or demand — it was that the existing model forced strangers to meet, exchange money and goods on faith, and absorb all the risk themselves. Rolle's founders saw this trust gap as the core design challenge and brought me in to build a platform that could eliminate it structurally.
I designed a dual-role platform with separate flows for buyers and sellers, held together by one principle: full transparency at every step.
For sellers, the listing process was designed to be fast but thorough. A guided flow walked them through defining their device's condition — appearance, functionality, battery health — and once submitted, the device was shipped to Rolle's operations team for an independent cross-check before reaching any buyer.
For buyers, trust was the design problem. They needed to believe in a platform in a market that had repeatedly failed them. I addressed this through layered trust signals: educational banners explaining how Rolle worked, secure in-platform payments, and listing cards that surfaced device condition at a glance using a colour-coded status system across appearance, functionality, and battery health. Each detail page included a full verified checklist of the device's specs.
The full cycle — listing, verification, delivery — was designed to complete within 48 hours.
I pushed for the creation of a live transaction timeline — a real-time status tracker visible to both buyers and sellers that surfaced every stage of the process, from offer acceptance through inspection, shipping, delivery confirmation, and payout. This feature became one of Rolle's strongest trust differentiators and had the highest reported impact on user confidence.
I followed the Double Diamond framework, spending the first half in the problem space before touching any UI. I ran competitive analysis across existing marketplaces to map exactly where trust collapsed, then moved into user research to capture the fears and decision points buyers and sellers faced. Every design decision that followed was grounded in a researched insight, not an assumption.
With the problem clearly framed, I moved into wireframes — testing layouts against the original user flows before progressing to high fidelity. I built the design system from scratch and produced prototypes for every screen and state across mobile and desktop, using After Effects for micro-interaction animations that reinforced the sense of a polished, trustworthy product.
