I worked at Interactive Brokers full-time (More than 8 years)
Senior people are all very smart.
Intense, and at times combative work environment.
Advice to Management
I applied online. I interviewed at Interactive Brokers.
applied online. It followed predictive index test. then got contacted by human resource. i was called in for in person interview and test. test consisted of questions about financial markets terms, probability and math. no calculators allowed