POS Renew — Supermarket POS System Modernization

• Legacy POS: A 2005-era VB app caused delays during operations.
• Outdated UI/UX: Less-experienced staff were slow at checkout.
• Old database: A bloated local file was hard to maintain, and data could be lost if a POS terminal failed.
• No reports/logs: There were no web-viewable logs or reports to reconcile against stores' paper reports.
• Unintegrated member benefits: The old payment features lacked member benefits; calculations were paper-based and gift cards were sent manually.

Modernize the legacy POS to improve usability and maintainability, building a modern POS platform that centrally manages the entire store chain.

• Code migration: Moved the app to ASP.NET and WinForms.
• DB migration: Migrated from Access 2000 to PostgreSQL 12 for easier scaling, management, and better performance.
• Cloud management: Added a cloud platform to monitor and centrally manage the whole store chain.

• Supermarket POS checkout features.
• Shared master management, statistics, reports, and data import/export on management PCs.
• System-wide notifications, data backup, and log access.
• QR-code coupon integration via code or customer phone number.

• Better usability: The renewal removed checkout delays so even inexperienced staff work smoothly.
• Maintainability & scalability: The PostgreSQL migration made the DB easier to maintain and scale and reduced data-loss risk.
• Centralized management: The cloud monitors the entire chain, with reports and logs viewable on the web.
• Member experience: QR coupons and member benefits are integrated into the system, cutting manual work.
• Delivery & operations: Built in 6 months (+2 months for delivery/handover); maintained with 0.25 BrSE and 1 Dev for a year, then fully handed over to the Japan side.