Pros
The work is interesting if this is what you want to do. It is not Google or even Microsoft and technologists will not be treated as well as the traders. However, it is not a bad place to come and learn the financial trading industry and then take those skills elsewhere to other companies or start one yourself.
Cons
The biggest complaint I have is the Management of this place. Different people will define management differently. I do not mean the person who manages me (who is great btw). I am talking about the so called Management Team which is made of people with little to no management experience (no MBAs, not prior work experience, no concept of strategy, no communication skills, limited vision, not dynamic etc). Only reason there are in the Mgt Team is because they happened to employed at IMC since the beginning. What they need is people with experience who have managed before and have not spent their entire career at IMC. Once this is solved, the place has potential. Until then, the Mgt team will continue to destroy whatever can be good about this firm.