Four months ago an England startup based in London tell me the same: OH, we read your unit test and OOD code that you sent us. Are so good, but we need that you develop CSS3 and HTML5 as well in our Rails stack.
Yeah, I saw this scenario here in Brazil, too. Some startups hiring Rails Developer and than, split it out to backend and frontend. Maybe we need give more time to market get stable. I spoke with 3-4 companies in last two months: all of them are looking for a Full Stack developer at this time.
As you said in the thread, Ruby is very, very awesome as OO language. But people only use 10% of this powerful making Rails' CRUD. Ok, Rails was and is important to the Ruby community, but I can't see Ruby running in places where Java runs today.
I point this because I'm sooo noob with frontend engineering and I don't like that area at all. So, my "fear" is Full Stack Engineer became mainstream in "Ruby community", you know
@thorstenmüller about my unvoted question :P - did you feel that in the near future - in your region - backend positions in Ruby will emerge more than now?