We are looking for experienced developers to work on a custom Warehouse Management System (WMS) designed for USA-based 3PL (Third-Party Logistics) warehouse operations. This is not a basic inventory app. It is a real operational WMS, inspired by platforms like ShipHero, built to manage inventory, orders, warehouse workflows, clients, and marketplace integrations. The system will be used internally and later sold as a SaaS / white-label product to 3PL warehouse owners. Why We Are Building This WMS Existing WMS solutions are: Very expensive Over-complicated Hard to customize Difficult to white-label We want a system that is: Accurate and operationally strong Simple for warehouse staff Scalable for multiple clients Sellable to 3PL businesses Ready for integrations and white-labeling Target Users of the System The WMS will support three user types: 1. Warehouse Admin / Owner Full system access Manage warehouses, clients, users Reports and analytics Integration and system settings 2. Warehouse Staff Receiving inventory Picking and packing orders Task-based access only No admin or client data access 3. 3PL Clients (Brands / Sellers) Separate client portal View their own inventory and orders Track fulfillment status Create inbound shipments (limited) Download reports Core Features Required Inventory Management SKU-based inventory tracking Available, reserved, allocated stock Warehouse/location-based inventory Inventory movement history Full audit logs Receiving (Inbound) Inbound shipment creation Expected vs received quantity tracking Variance handling Staff-friendly receiving screens Orders (Outbound) Order listing and filtering Picking and packing workflows Order status tracking Error prevention (wrong SKU / quantity) Client Portal Role-based access Strict data isolation per client Inventory visibility Order tracking Reports and summaries Marketplace Integrations (Important) The system must support future marketplace integrations, including: Amazon eBay Walmart Shopify Integration requirements: Secure authentication (OAuth where applicable) API token handling Webhooks Order and inventory sync Error handling and retry logic Multi-client isolation (each client connects their own store) White-Labeling Requirement The WMS must be white-label ready, including: Client-specific branding (logo, colors) Custom domain or subdomain support Feature toggles per client White-labeled client portals This is essential because the software will be sold to other 3PL warehouses. Tech Stack Preference Backend: Laravel Frontend: Blade + Livewire Database: Relational (multi-tenant aware) Architecture: SaaS-ready, scalable, secure