A vanilla JS Progressive Web App for retail point-of-sale, featuring multi-user authentication with Admin/Cashier roles, per-cashier drawer session tracking, shift management, inventory control, and sales reporting — built offline-first with IndexedDB and a service worker for reliable in-store use. And A multi-tenant SaaS content management platform built for parishes, enabling each parish to manage their own site, content, and admin users under a shared codebase