Hi there!!
I can get complete done your work requirement with quality work assurance because I have really experience provide such things and work done successfully.
I have developed many big application having chat features,Google map API integrations,Push notifications. I am confident to fulfill your needs in an timely manner and will provide you 100% quality work.
I have done such work in Framework, APIs,Android,GoogleMap/GPS App,IOS (iphone),OnlineChatting/Messaging App,Photo/camera/Video/Audio app ,OCR/Image Processing,Web Services ( Restful, JSON, SOAP,MySQL,PHP, Parse, Google App engine framework) ,Facebook API, Twitter API, LinkedIn API, Google+ API, GeoLocation, Instagram API, Youtube API ,Advertisement ( Ad Mob, RevMob, Google Ad) other.
Thanks !!