I have been working at Interactive Brokers full-time (More than 5 years)
Secure job (layoff very rare); relaxing working env; very nice coworkers; almost no politics; good location; good benefit; regular nine to five hours
Hard to gain promotion because of flat structure; pay increase slow; innovation not very encouraged; long incentive stock vesting period
Advice to Management
Put good new hired people in management to look at firm from fresh viewpoint
I applied online. The process took 3+ months. I interviewed at Interactive Brokers in April 2017.
First you have a phone screening. That's less then a few minutes long. A hiring manager invites you in to a formal interview. As soon as you walk in the door they give a 30 question test. This test is hard. You need to know basic math (long division, fractions, probability) without using a calculator. The rest of the test is on sercuities knowledge. If you don't have strong series 7 background your not passing this test. I'm glad I didn't get an offer. Everyone in the office looked miserable being there.