Studying and working in Montr?al

[Jonathas]

Hi, I'm glad I found this forum!

I'm a Brazilian guy planning on going to Montr?al some years from now, after I finish University (I've been studying Computer Science here in Rio).

I wanna work and/or continue studying there..

I'd like to know your opinion about something:
if I start my master's there, would I have time to work as well, or I'd have to choose between studying and working?

thanks in advance