Beware of Ghost Jobs, Jobs that are never filled but only exist to collect data on people.
1) I ask around my professional network
2) I talk to a trusted recruiting agency I've been using for decades
3) I start investigating companies (not just tech companies) to identify ones that sound like they're doing something I find interesting and apply directly. Note that I'm not looking at what positions they have listed as open. I'm vetting the company as a whole and applying regardless of whether or not I think they're hiring for the position I want.
I stopped using jobs boards or things like LinkedIn years ago because, for me, the cost/benefit ratio of using them isn't favorable.
In terms of getting a suitable job, I've had the greatest success with #3, followed by #2. In terms of getting the best jobs, I've had the greatest success with #1, followed by #2.
I also keep a list of headhunters that I respect. Yeah, there are a lot of bottom-feeders, but there are a few who are good. When I find one, I take note. When I'm looking for work, I reach out to that list.