Retail Supermarket Modernization // Al-Noor Hypermarket GroupCustom Systems & Embedded Hardware • 2026
Aravex Offline-First Retail POS & Barcode Billing Engine
High-speed point-of-sale engine powering 14 supermarket branches with sub-second barcode lookups, direct thermal ESC/POS receipt generation, and zero-latency offline buffering.
Retail Supermarket Modernization // Al-Noor Hypermarket Group14 Stores • 0s Downtime • 2.4M Transactions
The Technical Challenge
Local power and internet fluctuations caused cashier queues to halt. Conflicting price tiers and manual receipt reconciliation led to lost inventory and customer frustration during peak hours.
The Engineered Solution
Designed an air-gapped local SQLite engine paired with native Electron serial drivers for cash drawers and thermal printers, synchronized with AWS PostgreSQL using optimistic lock reconciliation.
Architecture & Topology
System Pipeline
Electron + React Native Serial Client -> Local SQLite Database -> Bidirectional WebSockets Sync Daemon -> Central PostgreSQL Cluster.Key Capabilities
100% continuous cashier checkout operation during internet outages
Sub-0.4s barcode scanning and receipt printer trigger
Automated shift closing, drawer audit, and multi-tax compliance
Unified multi-branch executive pricing management
Technologies Employed
ElectronReactTypeScriptSQLitePostgreSQLNode Native SerialTailwind CSS
NOW ACCEPTING SELECTIVE CLIENT COMMISSIONS
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