I was searching something on Meta and came across this answer on undeleting accounts.
Can anyone explain what the 'Jeff-level access' is the answer talks about?
Is it something related to Jeff Atwood?
Yes, Jeff Atwood is one of the founders of Stack Exchange as mentioned in Stack Exchange Management Team page:
Jeff Atwood - Co-Founder (Emeritus)
Jeff Atwood is a software developer, author, blogger, and entrepreneur. He is one of the co-creators of stackoverflow.com and one of the co-founders of Stack Exchange...
It means in order to solve the problem you need access to the SE database, which is limited to a few of the developers. So only SE employees can do that action. Since Jeff is be best known SE employee and founder, Bill called it 'Jeff-level access'.