If you’re a US (or Mexican) citizen you don’t even need LMIA, you might be eligible under NAFTA.

But I work in tech, and when I did this, I found it quite challenging to find an employer who would be willing to do this. Usually the employer needs an immigration lawyer and has to be set up with IRCC (i.e. the Canadian gov’t) to do this. An LMIA - if you need one - would be even more paperwork for them.