I like the way you say that only bid if you know Umbraco. :)
I am MCP, MCTS in C#, MCTS in HTML5/CSS3/JQuery, MCSD certified engineer covering WCF, Azure, MVC, etc.
I have worked with Umbraco lots for [login to view URL] website. I have worked in both Webforms Umbraco and MVC Umbraco.
I have made custom backend document types, etc. as well in a multilingual fashion.
I know what to do for your project.
Please provide me the details and I get started. You will be very happy with the work :).
~Cheers.
Love,
Angel