I applied online. The process took 2 weeks. I interviewed at Chicago Trading Company (Chicago, IL) in May 2019
Interview
1 round phone interview, Behavioral + Technical. Team work questions, should be really familiar with python data analysis, especially numpy. Dataframes, indexing, timestamp data. You should be familiar with it enough because in this job you sit side by side with the traders and quants so you have to produce data immediately for their need.
Interview questions [1]
Question 1
Numpy, Pandas. Team work related behavioral questions