It seems that it's actually quite difficult to get qualifying experience if one does software, see https://news.ycombinator.com/item?id=11220591 (since the experience has to be obtained under a P.Eng and it has to fit the safeguarding of life, health, etc criteria (so the work to develop a new gaming app likely isn't going to count).

This is probably why so few folks in software actually have P.Eng as per https://news.ycombinator.com/item?id=25826520 (regardless of if they use a title with Engineer in it or not).