Need expert who has done SSE Implemention in past.

We are working on script which can update more than 5000 browsers within 2 sec using SSE technic. Our current script use Ajax which might overload our server in future. We are not sure what will be needed to implement SSE. Our Senior Programmers has written all code using Codeigniter + jQuery . We will need script which can show demo where we will put some message and it should go to all browsers within 2 sec. I will like to know how you will prove that your script will run without any issue. What will be ur plan to show us demo ? This is few hours work form expert programmer who has already implemented SSE. We are also open to use web sockets for this. Please note that we are not looking for long pooling option. Our project manager from India will have Skype discussion with the selected candidate and will co-ordinate with programmer.