Hi,
I understand that your requirement is to develop a React.js web app.
I am a developer with 7 year experience in mobile and web development.
I am very comfortable in working with Flutter, React.js, Node.js, [login to view URL], MongoDB, Python and PHP.
I can also work with cloud providers such as Amazon Web Services(AWS), Google Cloud and Microsoft Azure as per your requirement.
Please initiate the chat so that we can discuss further.