Develop Shopify website modify themes EXPERT shopify needed

Design principles must know UI/UX
Continuously build, design and code our shopify stores. We will be replicating stores for different individual clients, MUST have extensive shopify experience



Requirements:
- Shopify, Page Speed Optimization, Liquid, Javascript, HTML, CSS, theme modification
· Ensuring excellent performance on all major devices/browsers, including fast load times & bug-free core functionality
- Shopify theme customization