Hi,
I am located in Jaipur, Rajasthan so if that's not deal breaking fact then please consider my proposal.
I have good experience in developing android application based on RESTful web services using JSON as format for data transfer. Few weeks back I reverse engineered Ola cabs android application to find vulnerabilities in its application so I have good knowledge of such applications structure and I can develop similar application in less than 15 days.
I doubt you will get better value for your money with any other developer.
Let me know if you have any questions.
Regards
Suresh