It’s built using magento 
Thanks for the answer, Where can I buy it? 
Check out some good themes from here: https://codecanyon.net/search/magento%20theme
Are magneto themes comapatible with shopify ?
no, magneto themes compatible with magneto. shopify themes compatible with shopify. wordpress themes compatible with wordpress. So, you have to purchase theme according to your chosen platform (magneto/shopify/wordpress)
Shopify have it’s own themes & Magento have it’s own
Oh ok sorry I’m not a tech guy haha 
, now I understand! I was looking for a theme for shopify like that jeulia.com it’s amazing how customizable the banners are on their website but more amazing is that they get resized accordingly on the smartphone to have a similar pc view. That’s why I though i asked.
You can choose any theme based on your design and functionality requirements from here:
All themes you will see in the above link are shopify theme and all themes should work fine with all devices. Just choose a better one, which one is maintain regular update to meet the latest technology and latest version shopify (you will get these info in theme page).
Thank you very much