I don't think it's really that different. I see "front end Ruby on Rails develop...

Touche on Oct 7, 2013 | parent | context | favorite | on: Node.js and the new web front-end

I don't think it's really that different. I see "front end Ruby on Rails developer" job ads all the time and have for years. It really depends on how the company is structured as to what is the front and back ends.