Hi, As i reviewed your requirement it's look fine for me. I have good experience in integrating with third party API , building Plugin and parsing it.
Relevant Skills and Experience
I have huge experience in java development and i worked on various java web application development. with Key skills on Angular JS, NodeJS, ExtJS, JavaFx, Web Services(SOAP,REST).
Proposed Milestones
$180 USD - Java Plugin
Let's discuss more in PM and start working on this, also i am looking at your document.