Initial article where the fired employee gets notification that he's also being hacked:
techcrunch.com
Today's update on the boss
Exclusive: Apple alerts exploit developer that his iPhone was targeted with government spyware
A developer at Trenchant, a leading Western spyware and zero-day maker, was suspected of leaking company tools and was fired. Weeks later, Apple notified him that his personal iPhone was targeted with spyware.
Today's update on the boss