BigBlueButton Video Conferencing - UI Interface enhancements and bug fixes

Hello, We are using BigBlueButton opensource for our video conferencing. We want to make some changes in its user inteface screens and also want to add subscription module along with payment gateway to it. Since Subscription module and payment gateway are very standard components, so I dont' want to reinvent this wheel. I expect these two components are available with you and can directly plugin into my application with minimal efforst. People who are having experience specially in bigbluebutton customizations may contact me. It is a java based application. Technical Issues : 1. Login Issues 2. Cache Management Issues 3. Session Management 4. Page Loading Issues 5. Respnsive Design Issue 6. Meeting recording - Testing required. 7. Meeting schedule invite email option 8. Calendar Creation Enhancements : 1. Add Subscription Module along with payment gateway 2. Add a little functionality in user home page. 3. Look & Feel Changes - Home Page - User Home Page - Admin Control Page 4. Enbling Third-Party app integrations. Expose APIs to third-party apps to integrate our VC in their appliations in secured way. 5. Demo Functionality (Allowing visitors to test the VC functionality for few minutes) Note : You have to connect to our servers through team viewer and work. We can distribute our source code to outside parties, so therefore it is mandatory to connect to our systems and work.