A friend of mine is maintainer of an open source service used (at least, at one time) by all of the major social media platforms as a load-bearing piece of thei

A friend of mine is maintainer of an open source service used (at least, at one time) by all of the major social media platforms as a load-bearing piece of their infrastructure (intentionally keeping it vague). My friend was invited to interview at one of the biggest and was rejected after having a bad whiteboard session. Of course they immediately replaced my friend's service (ha!)