Looking for a shipping expert

Shopify Partner
31 0 12

Hi, I'm building a Shopify app (in Ruby on Rails) that requires determining the cost of shipping an item, charging that cost during checkout, and generating a shipping label. 

Are there any shipping experts who would like a brief paid consulting relationship? I'd like you to work with my app's developers to help them build the required functionality.

Ideally, someone who is familiar with Shopify's CarrierService, FulfillmentService, and Delivery Profiles; and ShipStation and ShipEngine.