How long will it take you to finish the job?
I am assuming it is Spring Controller. It will take 1 hour to create Controllers(with Endpoints).
Modifying controller will take 1 hour depending on clear requirement.
Proposal:
I am full stack developer. I possess strong knowledge on Java, J2EE, MVC frameworks, MySQL, jQuery, AngularJS, Hibernate, PHP, etc. I have experienced of 4 years in IT. I consider myself best candidate for this project with quick solution and average budget.