This document summarizes the development of a WooCommerce plugin for InPost, a parcel delivery company, to integrate their shipping methods into online stores. It discusses how WP Desk, a development agency, worked with InPost over 60 days to develop the plugin for 4 markets. The project required developing APIs to connect to InPost's systems in each country and dealing with changing requirements. Though challenging to work at this scale, the project provided valuable experience for developing enterprise plugins and working with large clients.