Do you have a Shopify store already do you need some help or problem fixing i can help you for this gig i will be your Shopify expert and help you with any current issues you have i will take a look at your Shopify and give you a report on how things can be improved,
1-Theme Integration for Shopify CMS & installation apps.
2-New theme development ,customization & fix errors
3-Payment Gateway & checkout integration
4-Multi seller eCommerce store
5-Much more per your requirement
please check more services here ; www.fiverr.com/itstec