Thanks for your posting.
I have 6 years experience in Social Networking apps, Dating app, Chat app, Web based mobile application developing by using XMPP, RTMP protocol, Restful WebService, MapKit, JSON Data Encoding/Decoding and Backend APIs.
I can provide both of Backend API and Applications as well as admin panel.
Since I have rich experience in mobile developing, I am sure I can complete your project successfully.
I hope to meet you to discuss more details.
I would look forward to hearing from you.
Kind regards.