I've worked mainly with instrumentation, control, embedded systems and FPGAs
Maybe you will have great luck and a Hacker News reader in Buenos Aires will discover your question and offer you a job (but there is no contact information in your profile). It is more likely that you will have to depend on the ordinary luck of finding a job by gathering relevant facts about possible companies or by contacting the placement office of your school or by meeting people and hearing about a job from them. The internet probably will not replace most of the traditional hard work of finding a job.
Besides companies, it might make sense to look at hacker spaces and meetups and electronics surplus stores. Also, think about talking to companies that sell instruments and electronics parts because they will know who the local industries.
I don't attribute anything to laziness. There's only so much a person can do and before moving there are a lot of other things to do.