Hi there,
I'm the developer you're looking for. I work with Shopify themes every day, I know Liquid like the back of my hand, and my bread-and-butter is making tweaks using a combo of HTML, CSS, JS, and Liquid for store owners like yourself. I set up mom-and-pop shops, dropshipping stores, any kind of bespoke solution you require.
I'm underbidding the other freelancers on this project because as you can see, my account is brand new and I have no reviews to my name. So why should you give me a chance, let alone hire me for your task? You should give me the chance to prove myself to you because I have edited every Shopify supported theme: Debut, Brooklyn, Jumpstart, Minimal, Narrative, etc. I have edited many of the paid themes as well, like Parallax, Sunrise, Blockshop, and many more.
I have added date pickers to the cart, removed PayPal buttons from checkout stage 1, I change button colours daily, I add scripts to show remaining inventory levels on product pages, add theme colour settings, add extra fonts and font pickers and much more.
I hope that you'll choose me, as I know I can help you with any project you have in mind. Please do let me know if you have any questions.
Regards,
Joe