I can't comment on the Netherlands but for the US, just continue to do great work and continue to develop your skills and whenever possible participate in things public, that is, present/speak at conferences and other events, participate in or serve as a judge at hackathons and other competitions (such as Kaggle for example), write articles, and participate in open source communities and initiatives.

Hi, the company I work at in the Netherlands regularly hires Brazilians (also juniors) for cloud projects! And they fly over here and get settled and everything. Is there any way to connect (if you're interested)? They even facilitate the whole visa process and everything.

IMHO - certifications are the best way to prepare for career mobility. Follow your interests there, as there are lots of options and paths to take.

Shameless plug: Contact [email protected] to discuss options.