I need an android developer to work on already made app

I have developed recently an android app (Localization &navigation indoors ) app . but the problem is it was done using firebase as server to connect the database now we wanna to change the firebase to a local server ex:phpmyadmin and do the same database . so i want someone good at php to create the probable files (backend) to connect to the android and read the data and change the app (code) to work with the new local server . Note : I did local server using apache2 and php packages , so what i am expecting is the files configuration and connection and backending [login to view URL] ! to be able to make http request to read from this database the edited code to work with this database . what will be sent to the developer is : the old code (JAVA). the database . Time is limited .