Ruby on Rails 3 and Facebook Open Graph specialist

Only in Paris,
Looking for a confirmed developer ruby on rails 3 and someone with an extreme high knowledge of Facebook open graph (API)

Mission: integration and creation of any possible social tool and creation of facebook apps for a media site all developed in ruby on rails 3, html5 and css3.

In details: registration and login, user data and integration in user profile, sharing and recommendations, social reader, post images from the site, tagging, Facebook app, and any other suggestions and ideas are more then welcome.

We're looking for smart updated person, hopefully to create a long term collaboration.

Budget to be negotiate according to the work to be done.