Can I get a job offer from a Canadian employer while I'm still outside Canada?

It's possible, but honestly rare, and anyone who guarantees it is not being truthful. Most employers prefer candidates already authorized to work in Canada because hiring from abroad usually means LMIA paperwork, cost, and months of waiting. Your odds are best in genuine shortage fields — healthcare, skilled trades, trucking, some tech roles — and with large employers who hire internationally already. Be very careful: if anyone asks you to pay for a job offer or an LMIA, that is illegal in Canada and a sign of fraud.