I applied online. The process took 1 day. I interviewed at AKUNA CAPITAL (Chicago, IL) in Mar 2018
Interview
Online Math Test which was comprised of addition / subtraction / multiplication and division in addition to pattern recognition. You were not to use pad, pen or calculator - however it was tested online. I would assume the retest you later to confirm aptitude.
Interview questions [1]
Question 1
Mathematical Patter Recognition Test with no Calculator, paper or pen
I applied online. The process took 5 weeks. I interviewed at AKUNA CAPITAL (Chicago, IL) in Oct 2018
Interview
4 rounds with first two being math and personality assessments. Practice for the math is you are rusty with mental math and personality assessment you cannot really prepare for. Overall pretty straightforward process