Being a seasoned Shopify developer with over 10 years of proven experience, I am truly excited and confident to tackle your project. Having completed several Shopify theme upgrades, I am no stranger to handling complex scenarios such as identifying and migrating bespoke codes. As your project demands upgrading from Venue 4.7.1 to the latest version, it's worth mentioning that I am well-versed in all the necessary tools required, including Shopify's Liquid language and working with the Specialty Templates.
Furthermore, given my background in computer science and experience in web development, I have an extensive knowledge of all key web technologies pertinent to this job - HTML, CSS, JavaScript, JQuery-for developing and upgrading themes. My proficiency isn't limited to just the technical realm though. Over my career, I have also been known for my strong communication skills which enables smooth collaboration with my clients.
Finally, it's imperative to mention that if you pick me for this task, not only will I deliver excellent results but could also prove beneficial for your future needs since I can continue with building custom templates and potentially even assist with your domain migration. Let's team up and make your current store even more phenomenal!