Mobile app for shopify store

I am looking for a mobile app developer to create an app for my existing Shopify store. The app should allow customers to browse and purchase products directly from their mobile devices. I would also like the app to have in-app messaging or chat and push notifications to keep customers updated on new products or promotions.

The ideal developer should have experience with Shopify and mobile app development. The app design should be colorful and engaging to match my brand. I am open to custom design options, but prefer a colorful and engaging design that is easy to navigate.