About

I am looking for an experienced backend CS-Cart developer to build four custom CS-Cart add-ons for Tooyd.com (Multi-Vendor). This is a strictly technical backend project — no design, no UI/UX, no theme edits, no marketing features. Only CS-Cart PHP add-on development. Project Scope (Four Modules): Real-Time Two-Way eBay Integration: Sync listings, stock, prices, variations, orders, and order status using eBay Sell APIs (Inventory, Fulfillment, Order). Target update speed 10–15 seconds. Must include full error logging, queue handling, retry logic, and support for multiple vendors each connecting their own eBay account. SKU Barcode System: Automatic barcode generation for every SKU, printable labels (thermal printer support preferred), and barcode scanning within CS-Cart admin for product pages, search, warehouse tools, and POS. Warehouse Location Barcoding: Create and manage warehouse locations (e.g., A1, B3). Scan items into and out of locations. Show location inside product details, order pages, pick lists, and POS. Include a location audit mode. Simple Fast POS System: Barcode scan → basket → payment. Supports cash, card, PayPal, and manual payments. Must instantly deduct stock and sync with the eBay module. Includes reporting for sales, returns, stock movements, and till summaries. Strict Requirements: – Must have real experience building custom CS-Cart add-ons. – Strong knowledge of PHP, MySQL, CS-Cart hooks, schemas, controllers, fn functions, and Multi-Vendor logic. – Proven experience with complex API integrations (REST, OAuth2, webhooks, real-time sync). – Work must be completed in-house by you — no outsourcing. – Must understand CS-Cart product tables, stock structure, vendor permissions, and variation logic. To Apply, Please Provide: – Examples of CS-Cart add-ons you’ve built (mandatory). – Details of any eBay, Amazon, or marketplace sync integrations you’ve created. – Estimated cost and timeline for each module + total project estimate. – Options for ongoing support and maintenance.