Retail POS & Inventory Database Sync

Client Context

The client is a multi-store brick-and-mortar retail business with separate physical outlets and central distribution warehouses. They utilize barcode scanners for rapid customer checkouts.

Existing Environment

Each retail terminal ran a local, offline billing database. At the end of the business day, terminal databases exported sales files which managers sent manually via email to be compiled.

Business Problem

Manual end-of-day data compiles caused massive inventory lags. Outlets frequently sold items that were physically out of stock, leading to delayed shipping, purchase cancellations, and customer dissatisfaction.

The Solution

Sigmatic Soft built an event-driven POS & Inventory Integration Middleware. Whenever a barcode is scanned and checked out at any outlet, a webhook instantly fires to a central Redis queue, validating stock and updating the central database ledger.

System Architecture

Implementation

We designed a REST API interface with token-based authorization. We built an offline-fallback queue inside the local terminal: if the store internet goes offline, the sales logs are stored locally and synced automatically when the network returns.

Operational Outcome

Inventory levels are updated in real-time across all terminals. The central purchasing department has immediate visibility of fast-moving products and can run auto-reorders, reducing stockouts.

Lessons Learned

In retail operations, local internet reliability can never be assumed. Offline-first local queuing is a mandatory safety requirement to ensure transactions are never lost during outages.