I am curious about the names of companies that interest you because research is often helpful in finding an internship (and later when finding regular employment).

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.