Software Architecture Design and Documentation for Voip, Video, Instant Messaging Infrastructure and Mobile Application

I want a software Architecture and Design Documentation for Internet Telephony and Rich Messaging solution. Specifically, we are looking at a system like Viber/line, kakaoTalk. The basis of the back end system will be on Open Source software like Kamailio and Freeswitch. Also required will be a front-end application server for user management, payment sign ups etc. Finally, the system will have a rich client mobile application with minimum features of viber, line and KakaoTalk. Your Job as a Software Architect, Analyst is to produce a detailed Architecture document including wireframes for mobile app and web front end. We are not looking for trial and error bidders but rather very strong and competent Architects with skills in this area. You will make design decisions as in required clustering for the servers, the kind of scalability that system like viber and whatsapp use to sustain millions of users etc. You can part bid for this project if you know Voip Design but not mobile design as we may be willing to split the project and connect winners to handle different parts of the design. If you are contacting me, then show me similar jobs. This is only First Phase of this project, we will gradually be posting projects related to this documentation and design until the final product. I will send detailed file to qualified freelancers to give more information on what we need