Ask HN: What is Jerry(YC) and why does it keep showing up on the front page?

I've been on HN for almost 7 years now but recently I have noticed this particular link/text on the front page a lot. It goes something along the lines of "Jerry(YC S17) is hiring..." is this an ad? And if it is an ad I have not once seen any comments or interactions with this post. Why then does it continue to show up if no one is visibly interested in this thing?