Hi,
I can complete the chat application, please share the details so that I can further analyse and share the solution. I have already developed few chat applications using REST APIs, using socket server and using iOS push notifications.
About me, I have 8+ years experience in development of desktop, mobile and web applications, specifically in C++, C#, Java, ObjC, Php, Asp etc. Although I have just started exploring Freelancer, but can assure you that I am fully capable of completing this project with quality and will not charge anything if you are not satisfied with my work. Do share further details with me so that we can discuss more and come up to an agreement. Do let me know if you require any more details about me or if you have any query.
Thanks