Hello, dear client.
I hope you are doing well and safe from COVID-19.
As a professional FullStack developer, I've just read your description carefully and got that you are looking for a Node expert.
I already have a plenty of experience for Node & Express, GraphQL, RESTFul API etc and will perfectly satisfy your requirements, if you would hire me.
I built a lot of server for API like RESTFul and GraphQL using nodejs so far and think my skill fits on your project.
It is because I am crazy about nodejs and JS Frameworks and Libraries.
And I have a rich experience in backend developent and socket.io.
Please check my skills through profile and come in private chat.
https://www.freelancer.com/u/bozovicp268
Warm regards