Independent coffee shops often rely on disconnected tools — paper order slips, spreadsheets for inventory, no real visibility into sales. Bloom Coffee OS solves this: a multi-tenant SaaS platform handling online ordering, POS, inventory, staff management, and real-time analytics for multiple shops from a single system. I designed and built the full stack — Next.js/React frontend, Node.js/Prisma backend, PostgreSQL database — and deployed it to production, serving real customers with strict per-tenant data isolation and zero cross-tenant data leakage.