Development of Payment gateway for Chamilo and integrating with Opencart / Joomla

We have a Joomla website and we have Joocart (Opencart extension) installed on it. Separately we have Chamilo LMS installed we need to integrate Chamilo with Joomla We need to do the following options for Chamilo LMS: 1. Development of Paypal payment gateway for Chamilo 2. Development of CC Avenue Payment Gateway for Chamilo 3. Changing currency and payment option based on the user's billing address 4. Integration of Chamilo with Joomla with Single Signon 5. Integration of Chamilo with Joocart (Opencart) 6. Customization of Chamilo based on Joomla Template 7. Increase rendering speed of the Chamilo so that the course can run smoothly. Persons with the required experience only bid