Hello Dear, I've read your project description and I can design and build shopify store to sell phone cases and accessories with modern look where you can manage products, customers, orders, payment, shipping and much more in an organizational way as per your requirements. Let's have a quick discussion about the project.
We have extensive experience in designing and developing Portals, Web and Mobile application, E-commerce in all major platforms, etc.
I am sharing our portfolio with you have a look,
https://www.freelancer.com/u/kamran2012
Thanks,
kamran