Not that easy! TN visa is kind of automatic if one have engineering degree from Canada or related job offer. Even for 'software developer' it can be tricky. Also Canadian citizenship after 3 years is in reality 3 years + 1-2 years of the wait time. Source https://www.canada.ca/en/immigration-refugees-citizenship/se...
That's not been my experience when hiring. Serious candidates from serious schools don't seem to have any issues getting it.