Hello,
I can surely help you out to create an app for Shopify for integration with FedEx as per your needs.
As I have total 10+ years of experience with Shopify, Ruby on Rails, AngularJS, React.js, Node.js, Server management, Git, PHP, AWS, HTML, CSS, JavaScript, etc... technologies and based on my experience and expertise, I assure you that all your requirements will be FULFILLED with a satisfactory OUTCOME.
I have worked on many enterprise-level Shopify projects with a high level of my client's satisfaction. Also, I can give you a demo over a call or during an interview. And I am really interested to discuss your project requirements thoroughly. Please open the message box to go ahead.
Kindly let me know if you have any query or concern.
Waiting for your response.
Thanks!