There aren't very many Human-Computer Interaction vacancies in Catalonia; the current count is just 13. Maybe, you could try slightly farther afield. Usability and User Interfaces vacancies as the main columns will yield many vacancies to those at the current time seeking a new challenge. Topics like UX, Usability, and Personalization are very commonly mentioned in job ads of this kind. Out of unique companies recruiting, 3 are running in the Telecommunications field, 3 in Automotive, and 1 in Games.
With 4 Human-Computer Interaction vacancies on offer, the odds are ever in your favour when it comes to finding a great junior position. Take note that there are at the current time no internship positions on offer in this area. If you're eager for a startup Human-Computer Interaction vacancy competition is likely. Only one startup is currently recruiting in this area. Many employers advertising vacancies in this area (2 out of 13) use personnel agencies for the bulk of their recruiting. Professional candidates who value directly-posted job ads more highly, can filter personnel agencies from their feed. Why not have a look at vacancies in another country to compare and contrast opportunities. Just use the Explore tab.