I applied online. The process took 2 months. I interviewed at Gelber Group (Chicago, IL)
Interview
Several phone call rounds with traders. Standard behavioral questions and math/probability/coding questions. One technical round where you showcase a technical project to an algo trader. They then flew us out to Chicago for a super-day.
Interview questions [1]
Question 1
Most people fail in trading, why do you think you will succeed?
Pretty standard behavioral only questions. First with HR, then with a junior trader. After that was with more senior people and then a final round in person. Final round has probability and more technical questions so is the hardest.
Interview questions [1]
Question 1
Why trading, why Gelber, what do you personally trade
I got called in for a super day with 10 other candidates and interviewed with all the different types of traders, on the algorithmic and discretionary sides. Lasted the full day and ended with a dinner.