We are going to launch Shopify based eCommerce globally but we have a custom app to develop that will be integrated with the checkout page for complex customization. We do not want to use any readily available custom app as those do not fit out needs. My team was able to build a custom app and integrate it with Shopify checkout page. They are also able to make the app talk to some 3rd party APIs through serverside nodejs deployment where the serverside nodejs is deployed in an external server.
But the team is stuck with implementing react.js in the custom app. They are able to implement CSS, JS, HTML in the custom app and even able to make the app talk to 3rd party API through our private nodejs server hosted in another hosting environment.
Can you help us integrate/develop react js for the custom app? Please note that this custom app is to be used by out e-commerce store customers and not the shopify store admin.