I applied online. I interviewed at Virtu Financial
Interview
It's pretty interesting. You just need to talk with a specialist and answer his questions. I think you can try it if you have many experience in math and physics
Quantatitive Trader applicants have rated the interview process at Virtu Financial with 3 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 39.9% positive. This is according to Glassdoor user ratings.
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