Nightkey — a four-sided nightlife marketplace I built end to end: an iPad-first club dashboard, a guest app for table bookings, a promoter app for guest lists and commissions, and a bottle-server surface. One Supabase backend (121 migrations, RLS per role, 33 Deno edge functions) with an embedded PayFac pipeline for sub-merchant boarding and split payouts, ID verification, and a Konva floor-plan editor.