[brudgers]

Determining which statistics and creating a technical definition of "desired tech stack" might be where I would start. Though I'd be the first to admit that where I would start may be orthogonal to sensible.

[eulji]

Jobs ads for example: "whatever position" but keywords : ruby, rails, ember, hula, dancing etc @ Berlin

What people search for

anything else ?

[brudgers]

Thanks for the answer. Unfortunately, I still don't understand what exactly the question is about.

Good luck.