Building a custom e-commerce on Firebase with atomic orders and admin panel

A developer built a fully custom e-commerce site for a POS terminal reseller using Firebase Realtime Database and Netlify, avoiding off-the-shelf platforms. The system handles per-product pricing variants, duplicate-proof atomic order numbering, and an admin panel secured with PBKDF2 hash. It processes about 40 orders per day, keeping commercial data separate from internal management data.