Incidentally it can also work at your existing company. I’ve gotten 5 promotions in 6 years and my salary is 120% more than when I started. It’s less the company hopping part and more ensuring you grow in your career. I’ve found that it’s definitely about stating your desires (having a clearly defined “this is where I want to go in my career”), volunteering for the random projects your boss or their boss needs done and showing you want to grow.