There are agencies in Spain. Try putting agencias de empleo into your search engine

What work do you do? As a rule of thumb, a company must, as part of the visa application process, prove that nobody who has automatic right to work wants the position.

Generally, a company won't apply for a visa for a potential employee unless it's for a very niche position.

 

Gemma, please do not compare job agencies in the UK and Spain, as you're comparing chalk and cheese! If you're expecting a job agency in Spain to pro activity find you a job, hell will freeze over first.