Twitter pays engineer $10 mln as Silicon Valley tussles for talent

There's a bit of a difference between "engineer" and "senior vice president of engineering".

Further down, you can read:

even entry-level engineers can draw lucrative salaries in the Valley. Google Inc offered $150,000 in annual wages plus $250,000 in restricted stock options to snag a recent PhD graduate

Being a PhD graduate doesn't make you "entry-level".