Full stack developer and designer for retail store Management System

About Us We run an electronics accessories shop with around 600 products. We manage stock and invoices in Excel, which causes wrong stock counts and no clear view of profit. I want a custom web app built from scratch that I fully own, with no monthly fees. Features 1. Login & Roles Admin has full access. Staff can make sales but can’t edit prices or see profit 2. Inventory Products with SKU/barcode, buying and selling price, quantity Import existing products from Excel (around 600 rows) Barcode scanner support and low-stock alerts Stock updates automatically on sales, returns and new stock entries 3. POS & Invoices Fast sales screen with discounts and payment method (Cash/Card/Bank) PDF invoice with shop logo, printable on an 80mm thermal printer Returns linked to the original invoice 4. Customers Save customer details and view their purchase history 5. Dashboard & Reports (Admin only) Daily and monthly sales, profit, and top-selling products Sales report exportable to Excel 6. Activity Log Track who added, edited or deleted any record Technical Modern stack (Next.js + PostgreSQL preferred) Responsive on desktop and tablet Deploy on my hosting, with source code on GitHub and a short Loom video To Apply Share similar projects you have built