Pros
The job you take afterwards will feel like a beautiful dream. I couldn't believe the relative level of meritocracy and flatness I encountered at my next employer - and that employer wasn't even a tech company. To this day I feel a gratitude for my current worklife that I wouldn't feel had I not experienced the sad world of Highbridge.
Cons
Are you a software engineer? Highbridge is not competitive with the tech sector on compensation. And yet, Highbridge's culture is as top-down, butts-in-seats, and hierarchical as it gets. "Imagine if the traders saw you," I often heard people being told. One day my manager said it to me because the shades of my black socks weren't quite the same. Sounds like a joke, I know. It wasn't. This place was my introduction to the working world and the one good thing it taught me was skepticism. Inside Highbridge they think they have strong technology chops (despite massive turnover and brain drain for the above reasons) because the ones who are left there have no frame of reference or are trapped for other reasons. *Alternate reality warning.* Run!