they are Dutch with offices in Chicago, London and Amsterdam and I think Sydney.
they do options market making, mostly on Eurex.
they are one of the biggest in this field.
the questions will be bloody hard and there will be more of them than you can realistically answer in the time period. you are given several tests, with less time for each consecutive one. you have to work very quickly. it is harder than the tests for other firms and banks, but worthwhile as they are a good company.
