I need a web-based application that lets my admins, employees, and customers move smoothly from checking stock to placing and paying for an order. At its core the system must combine inventory control, billing, and order placement in one dashboard so nobody has to jump between tools. Because several user roles will be logging in, role-based access is essential: admins oversee everything, employees handle day-to-day stock and sales entries, and customers view availability, create orders, and download their invoices. Key functionality I expect on day one: • Tracking stock levels in real time so low-quantity items trigger alerts • Generating reports (sales, inventory valuation, reorder points) that can be exported to PDF or Excel • Categorizing items with searchable tags and multi-level product categories A clean, responsive interface is important, but speed and reliability matter more; please choose the stack you are most comfortable scaling and maintaining. I am open to Laravel, Django, Node, or comparable frameworks as long as the final build is well-documented and easy for another developer to extend later. Deliver the full source code in a version-controlled repository plus a brief hand-off guide that covers environment setup, database schema, and how to add new users or item categories.