The hiring process is simple. Sent a resume in and was invited to the first round phone interview. After that, a second-round phone interview and then the onsite interview. The first round interview was a 30-min technical screening, with a few basic probability questions which can all be found in glassdoor (something I only realized when I was preparing for the second round interview). The second round interview (40 mins) was significantly harder. I have basically read all the interview questions in glassdoor, but unfortunately facing two new questions in the actual interview. Long story short, the first question was hard and I did bad. I was only able to narrow down the answer to a range and then moved on to the next question. Similarly, I only gave my best guestimate of the actual answer. The longest time the trader allowed me to think without talking was 30 seconds. Feel bad after the interview but surprisingly received an invite to onsite a day after. The trader explained in the interview that it is ok to not find the answer to the question and he want to know how I approach the question. One feedback was given in the end when I asked for advice to improve: think more before diving into specific calculations. My guess will be: They only design such difficult questions to understand how you approach a question, how you react to the many hints given by the trader, whether or not you have a good intuition and whether or not you can make a sensible decision based on a limited understanding of the problem within a very limited time frame. Good luck everyone.