UI Designer for Experiments of Call to Action Placements within Online Funnel

We are looking for a designer experienced in designing pages and interactive elements within online e-commerce checkout flows, lead registration forms, and/or online subscription funnels. Our company provides a service that helps online brands convert more customers by providing live sales assistance alongside their digital experience. This includes implementing code on the client website that... surfaces advertisements / CTA's to direct customers to these personal conversations (e.g. call us, text us, chat now, schedule a time to talk). We are looking for a designer to help us design each of these elements, and show how they will appear in the client site, on both mobile and desktop. Initial project will be for 3-4 new elements we're working on, though in the future we will also need help adapting these to other brands/funnels