API Integration Specialist (shopify, amazon, ERP, WMS, etc)

We are looking for an experienced API integration developer to help build and maintain integrations with ecommerce platforms, accounting systems, ERP systems, and warehouse management systems. The goal is to pull operational data into a standardized format that our platform can use. Integrations generally follow the same pattern: 1) User selects an integration in our web application. 2) OAuth authentication flow is completed. 3) Credentials and metadata are stored for the customer. 4) Data is pulled from the source platform and normalized into our database. 5) We handle ongoing synchronization through scheduled jobs. For sales channels, our primary requirement is daily sales transaction data including: * Order timestamp * SKU / Product ID * Quantity sold * Unit price * Discounts * Shipping charges For warehouse management systems, we typically require: * Inventory by SKU * Inventory by warehouse/location * Inventory status * Shipment information For ERP systems, we generally require both sales and inventory-related operational data. Please review the screening questions and provide estimated implementation hours for platforms where you have prior experience.