Need to build a backend for android application on AWS

I have a client who need a back end engineer for RESTFUL API development for his android app(similar to MyGate).

Technologies to be used: AWS Lambda, AWS DynamoDB, SpringBoot, Java11.

The architecture is built and deployed, need to build APIs .

The person needs to work with the architect to develop the APIs.

Time needed: 15hrs / week
Payment: INR 6000 / week

Thanks,
Aakash