5. Robert Cezar Metai

Missed: Facebook, Instagram, Square

Robert Cezar Metai must be a real special techie to have received offers from Facebook, Sqare and Instagram. He was offered the role of the second engineer at Instagram which he turned down to join Quora. After being he said that he was impressed by its vision and purpose.

"If you're in the Valley for any amount of time, you'll have missed opportunities," writes Matei on Quora. "Whatever. Opportunities were rarely as close as they might seem in hindsight. There are a million ways my life could have turned out worse, too."