Shopify developer needed to build gated practitioner portal with login and approval flow

We already have an existing website, but we need a developer to maintain and update our Shopify store, integrate APIs, and help get the site fully ready for launch, covering things like product pages, checkout flow, and general site fixes. Strong Shopify and Liquid experience is required, along with comfort working with APIs and existing themes. We prefer someone who communicates proactively and can work independently from a clear brief. A specific portal build will follow later on, this will be a login only area for approved users with an application and approval flow, along with a space to build personalized recommendations. Ongoing availability for that phase is a plus.