Full Stack Developer who can fix the React based web app, using Node backend server

I have several things to be fixed in my current web application.
This was written in React for the front-end side, and the Node/Express for the back-end side.
This task should be done in 2 weeks.
Task specifically following:
– Fix the LWA authentication
– Upgrade API from v2 to v3
– Change and update some UI

The freelancer should be well aware of the Amazon API and Marketplace including basic MERN stack knowledge.
Please only send your proposal if you are very familiar with AWS Marketplace and API.
Thanks