E-Commerce Implementation Partner

We are now looking to migrate our Shop from Magento v1 to a new platform, BigCommerce. The new Shop will display a new frontend design that we have created, which aims to make it easier for people to have low cost, regular, active days outdoors, whatever their circumstances. We are looking for a Development Partner to build our new site. As such, we will need them to migrate all current product, customer and order data and all current functions and services, in addition to creating the new required functionality that will make it easier for users to get the most out of the site, and then more importantly, get outside.