Pros
If you want to be in high frequency futures trading, it is one of the best. If you want to be in equities, options or any lower frequency trading, there are many better places.
Cons
My thesis advisor was active in start ups and had experience that led to him talking about general business practice and not just science. A few things he said stuck out to me that didn’t make complete sense at the time. Things like “if a company says they are flat structure or meritocracy, run the other way.” Or if a company says “we don’t have politics” also run the other way. The reason being of course is that it is a big lie and it really means there is an incredible amount of politics and the structure is set up by the powerful to maintain power and not run an optimal company. I ignored this when I joined Jump thinking that maybe it really was different. But it is obvious that the structure here is terrible and the politics unbearable. Power is based on tenure or loyalty to people with tenure. Unsurprisingly a group of sycophants thrive on this.