Ask HN: API Library for Python, .NET - Best places / ways to create a contest?

I need help to create libraries for our app. What are the best places to create a contest to create an API library & reward contributors? We have the library in CURL, JAVA, PHP & Ruby. I need additional hands to help with creation of Python & .NET libraries from developers who can bring out the flavor of the language. Inputs to find quality forums where there will be takers to deliver quality work is welcome. Thanks.