I think the skills you need to throw together a nice RoR app are different from other positions. I wouldn't want on critical infrastructure code alongside some

I think the skills you need to throw together a nice RoR app are different from other positions. I wouldn't want on critical infrastructure code alongside someone who can't reason through the performance implications of their code on the fly. You can waste a hell of a lot of time diagnosing and fixing performance problems because someone built an entire module around an inappropriate data structure.