Goodlabs turns a blood donation into free, personalized bloodwork — donate, and the panel your doctor would normally order is covered. I led design across three connected surfaces: the logged-out web flow that takes someone from landing page to booked appointment, the credit system that governs which tests a donation pays for, and the mobile experience people use in the donor chair itself. The hard part was never the screens. It was reconciling a clinical catalogue of 60+ biomarkers with people who mostly don't know what a biomarker is, and doing it inside a funnel where every extra decision costs a booking. I worked each flow in rounds with the team, pressure-testing options against the real edge cases — unaffordable tests, spent allowances, partial selections — and specced the states engineering would need before any screen was final.