migrated and recreated in node.js

to be honest, I am currently working on the project as a developer and i need someone to work with me
the entire project is being migrated and recreated in node.js

node.js is javascript base and the job is back-end development only
Asynchronous communication in the APIs being developed is highly preferred
We use mongoDb + AWS
basically the task is to grab the json request coming from one API, work on it, create a request payload and send it to another API
there are multiple API calls
project has some inhouse NPM packages we use and some are picked from the open world
there is simple mathematics involved, which is directly shared by the business and we have to make changes OR create new services as per need
The payments will be $200-300 depending on quality and punctuality
You will be working on the project for about 3-4 months, only if quality delivery is made