Retail POS System Development

I need a full-featured Point of Sale system tailored for a small retail shop that scans barcoded products. Every sale, refund, and exchange must be captured with real-time updates to inventory whether staff scan the barcode or add the item manually. The POS must log cash, debit card, and credit card payments at line-item level so revenue and tender totals always reconcile. What the software has to do for me • Instantly adjust stock counts the moment an item is sold, returned, or received into inventory. • Maintain a searchable purchase history, broken down by supplier, to show exactly what was bought, when, and at what cost. • Produce visual reports that let me slice sales daily, weekly, or monthly and toggle GST-inclusive or exclusive views. • Track monthly spending on inventory and generate a quarterly GST report alongside a standard profit-and-loss statement. The interface should be fast and intuitive on a standard checkout PC with a USB barcode scanner; staff should also be able to search and add products manually when needed. Deliverables 1. Installable POS application (desktop or web) with user authentication. 2. Database schema and source code. 3. Documentation covering setup, daily operation, and backup. 4. Sample data set plus a short video or screenshots proving all core flows work. I’m happy to answer technical questions quickly so development keeps moving. Let me know which stack you suggest and any similar retail systems you have already delivered.