I am a former Shopify support advisor, a position with scope and responsibilities very similar to the position/task you have advertised. In my tenure at Shopify I have worked to implement a number of strategic eCommerce initiatives successfully.
One of my primary responsibilities is the development and management of start up and stable eCommerce websites. This key experience of mine should be a great background in the task you posted.
I have experience developing and supporting various merchants and provided tactical business objectives. I also have demonstrated the ability to work collegially with executive leaders across business units and lines of business. Of equal importance to the position you've advertised, I have focused on developing best practices and core competencies for company eCommerce initiatives. These range from creating and modifying search-related landing pages to linking customer needs to the eCommerce experience. All of these best practices have successfully improved online experiences.