What kind of insect is this?
I found it in my work room.
I live in the city of São José dos Campos, São Paulo, Brazil
Based on the roundness of your specimens, I'd suspect that they represent possibly the 1st or 2nd instar development stage.
I am unsure of the species currently, though I suspect this is an image of the adult (wrongfully labeled as a "bed bug" at its source):
I will dig into the Brazilian fauna to see if I can get you a species...