MERN Management Site Backend Improvement

I'm looking for an experienced MERN stack developer to work on my management site, specifically focusing on the backend with Node.js and Express.

Read this. Everything in Red is needed for an already built system.

https://docs.google.com/document/d/1UL79nbSUwXnzcJSc1pD56URLqtMzGRfk9BDvW_1MpK0/edit?usp=sharing