I applied through university. The process took 2 months. I interviewed at Flow Traders (Mumbai) in Dec 2015
Interview
Flow Traders came to our campus to recruit Junior Traders. More than 500 people applied. After shortlisting based on Resumes and Statement of Purpose, the applicant pool was halved. Then came two tests, the first one testing our numerical abilities (75 arithmetic questions to solve in 10 minutes), and the second one being a two-part test: psychometric (192 questions in 30 minutes) and aptitude (68 questions in 30 minutes). A handful of selected candidates were then interviewed in two rounds. The first round was majorly HR based (motivation, why flow, why trading, questions based on resume, etc). Preceding the second interview was a trading case (7 questions based on trading in ETFs on a hypothetical market in 20 minutes). The second interview was more of a discussion of the case than an interview, where we discussed the questions on the case and the approach I took. With a few helpful hints from the interviewers I was able to solve the problems I couldn't before in the allotted 20 minutes.
First was a mental maths test of roughly same level as Optiver 80 in 8. Then had a 1-1 interview with HR, did not pass as had not researched company well enough.
I applied online. The process took 1+ week. I interviewed at Flow Traders (Amsterdam)
Interview
I passed the online mental math test, then got eliminated in the second round which was an online interview with HR, where I was asked to play a market-making game in which I had no previous experience. Although it is a junior position, you are still expected to have plenty of technical knowledge.
Interview questions [1]
Question 1
Do you know any ETFs? How are they priced? Do you know the current market price of the ETF you mentioned? Let's play a market-making game with that ETF
First round - math test, second round with HR on behavior questions, then with trader and HOT on more technical questions, do not expect deep knowledge on ETF. In general, it was not in a very harsh environment
Interview questions [1]
Question 1
How would you hedge your trade if you buy stocks in Samsung