I have been working as a professional Shopify developer for 8 years. I've read your requirements carefully and I can update your store.
I have rich experience in theme development & customization, store development, store design, app integration, store optimization, API integration and SEO. Also, I have good experiences with Frontend such as HTML5, Bootstrap, SCSS, PSD2HTML, PSD2CMS.
Please contact me for further discussion.
Sincerly