I've developed number of Shopify Websites using JavaScript, Node.js and MongoDB database.
I'm very familiar with JavaScript libraries such as React.js, Vue.js and Angular.js
What I had done:
Create SEO-oriented websites with HTML5/CSS3/Javascript, MERN, MEVN.
Shopify Template development from design XD/Figma.
Migrate sites from other CMS to Shopify.
Shopify API integration.