Optimization of small web application project in ASP.NET

I have created a simple Web application project in ASP.NET. It includes 1 multiview page that contains two grids that are updated on a timer and another gridview that is updated on callback. I am myself a C# developer but with little experience in ASP.NET. I have placed all of them inside UpdatePanels and AJAX enabled them but still I can see some flickering. I need a good web developer who understands AJAX in detail and can optimize the webapplication and minimize server client data transfer. This should not be more then a couple of hours or even less work for an experienced web developer.