Optimizing customer experience - Airinum.com

We have a lot of things going on right now on Airinum, we are re-building and re-branding our website, we have a lot of new functionalities that need to be developed and we have a bunch of A/B-tests that we want and need to do. We don´t have enough internal resources to do all of this in the speed that we need. Therefore we are looking for an external developer that can be a part of our team and work with us part-time on a regular basis together with our Product Owner to make our customer journey more efficient and inspiring. Our website is Shopify based so we are looking for a developer with Shopify experience.