Hi Sir,
I have good experience in Java, PostgreSQL, Mybatis development. I am expert in AWS and using codenvy as IDE. I checked your attached pdf document and it's looking good to me, I will build the web service which will collect the data about usage of the application and store it in PostgreSQL DB.
Your requirement is looking good to me and i would like to discuss as i have few question and i am ready to start your project when you want. Feel free to message me.
Thanks,