How to 'Level Up' for E-Commerce Site ?


I have an online website that I created myself through Wix ( I've also used Shopify, Squarespace ), but I wanted to step up from this and create a more consumer-friendly e-commerce website. Some examples I like are

My questions are

1. What is the minimum job role I need to search for to create those kinds of websites? (UX designer? developer? etc). ( More budget-friendly )

2. What is the maximum job roles that would be needed to be filled so I leave no stone unturned? ( Assuming I have an unlimited budget. )

I am working on my business plan and I am quite stuck on this aspect of things!

Hope it makes sense, Thank you,