I've done homework as a candidate twice, and given it once as part of the hiring team. Every time, it was after an initial phone screen. When we gave homework,

I've done homework as a candidate twice, and given it once as part of the hiring team. Every time, it was after an initial phone screen. When we gave homework, it was to a slate of junior candidates, primarily just out of college. When I did homework, I was unemployed and looking for my first job in tech. If homework is a good idea ever, those are the circumstances. You have candidates who are hard to evaluate, will get a large benefit from a job offer, and are less likely to have severe time constraints. I wouldn't make it a requirement for all potential hires.