Build a complete ecommerce website

Hi, I am in the process of starting an eCommerce business and I am thinking of using either Shopify, Magento or bigcommerce as the ecommerce platform. I am very particular in the design I want for the website so I can provide instruction on the design and will create the content and photographs etc for the site. I just basically need someone who can write the code and can bring my vision to life for my business. I only have one product at the moment so the site will not have a lot of pages to it initially. I basically want it to be like the one below, in terms of how the site flows to inform people about their product and the type of design that I am looking for also, as well as all the typical components of membership, social media plugins etc. [login to view URL] I also very much like the design of this also and it is similar to the one above, how pages tend to flow over different photos and move onto the next section within a certain page. [login to view URL] Initially I am gauging if its possible to create these types of sites with the above ecommerce platforms. As mentioned i will write the content and provide the photos etc so just need someone to program it. I am also thinking of creating a launch period where people can read through the website then sign up for a pre-order before the site goes fully live. Thanks John