Can’t speak for OP but at my company IC stands for ‘individual contributor’ (as opposed to a manager)

I don't know why this comment was downvoted for trying to provide clarity, because I too, started scanning OP's reply in search of a meaning for that acronym that appeared from thin air. If someone disagrees then they should simply state what they think is the correct definition. But in my opinion this comment contributes value by making it clear that not everybody is familiar with this jargon.

Incorrect definitions should be downvoted to make it clear that they're mistaken.

Uhm, I would expect a reply to provide that clarification.

I expect to find useless and inappropriate comments downvoted, but there is no official policy that I remember, so those are only my ideas of how downvoting would help moderate a discussion.

Then the people that downvoted should provide a correction. I still don't know what IC is supposed to stand for. I'm assuming it's not integrated circuit which is what I think about when I see IC.

IC typically means 'individual contributor'.