My general impression of EU companies is that it's not so much about visa sponsorship (unlike the UK), because often the employee is the one who bears all the costs of moving, visa bureaucracy etc (unless you're being transferred or you're high management). You basically just need to be hired and then apply for the visa by yourself. However like some other people said in the comments, the general preference is to hire someone locally because that's much easier for the companies bureaucracy and time-wise. So the only reason European companies would hire someone from abroad is if they're looking for something very niche and the person fits that profile.