The original title is about a custom e-commerce platform built on Firebase. Let me rewrite it for a mobile feed.

Short summary

Developer built a custom e-commerce platform using Firebase Realtime Database for a POS reseller, implementing atomic order numbering to prevent race conditions and PBKDF2-based admin authentication. The architecture separates e-commerce and management data, uses a global tariffs archive to avoid plan duplication, and handles concurrent orders via Firebase transactions. Code examples demonstrate atomic counters and Web Crypto API for password hashing.

• •Custom Firebase e-commerce with atomic order numbering and PBKDF2 admin authentication
• •Separate databases for e-commerce vs management, global tariffs archive for pricing plans
• •Demonstrates race condition handling via transactions and Web Crypto API security patterns

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