Quantitative Trader applicants have rated the interview process at Two Sigma with 4 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 43.1% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Took an online assessment and then had a screening call with a recruiter. The online assessment had a mental math section and probability questions. The recruiter call was pretty laid back and not too stressful.