ShipStation-Shopify Multi-parcel Tracking API

We need a developer to build an API integration between ShipStation and Shopify. Some customer orders are shipped in multiple parcels, so ShipStation generates several tracking numbers. Currently, Shopify only receives one master tracking number, meaning the customer cannot see or receive updates for every parcel. The integration needs to: Find the Shopify order using the corresponding ShipStation order number. Retrieve every tracking number attached to the order/consignment in ShipStation. Send all tracking numbers back to the correct Shopify order. Ensure the Shopify dispatch email lists every parcel and tracking number, rather than only the master tracking number. Prevent duplicate tracking numbers or repeat fulfilment emails. Work automatically for all future multi-parcel orders. Include clear error logging for orders that cannot be matched or updated. Please only apply if you have direct experience with the ShipStation and Shopify APIs. In your proposal, explain how you would handle multi-parcel fulfilments and avoid sending duplicate customer notifications. Please include your estimated cost and completion time.