Confidence. Connections. Opportunities.

Act like you know what you're doing (you are likely more capable than you give yourself credit for). Be open to networking opportunities.

Give yourself the opportunities to get a job by applying to places you might be at least a 50% match for, using a well-crafted resume. A lot of these job listings are written on a game of telephone. A lot gets mistranslated between the dev team, management, and HR. Let the interviewer and your own judgement decide if you're a good fit or not after the interview, not that job listing.

These folks are getting to the hiring managers just by sheer number of applications (or knowing the right people), knowing how to get past the filters, and presenting themselves as a great candidate. Do the same, and you might have better luck.