Amazon's robotics boss, who defended the company when a top VP resigned over employee firings, has abruptly quit — making him the third 'Distinguished Engineer' to leave this year (AMZN)

· Amazon's VP of robotics Brad Porter is leaving the company to join an AI startup, according to people familiar with the matter.
· Porter is a highly respected engineer and one of the 20 or so executives to hold the "Distinguished Engineer" title at Amazon.
· His team was responsible for improving Amazon's warehouse...