Design a beautiful keyboard for iOS

I am looking to create a keyboard plugin for the iPhone. This isn't an app. It's just the keyboard itself, and it will only support English for now. I need a graphic designer who can create a look and feel that is similar in style to the built-in iOS 8 keyboard. Please also check out keyboards from Swiftkey and Swype. I don't want to copy any of these, but they are good to see to understand the most common looks for the keys. Please also let me know what font you would recommend. I like the built-in font used by Apple but I'm not sure if that is free to use. Please let me know what you suggest in your bid. Thanks!