Re-Build Android App

I need to have a mobile app fixed and cleaned up of the dead code. I have the source code and can provide access to the server for the client-side files. This app specifically uses a map and a custom-built booking system. I would like have the specific code for this feature so I can add it to my iPhone app. The code is PHP, JS, Laravel and the server is on GoDaddy. The map uses Google Maps API. I need this job done quickly so that I can begin to add new functionality.