5 Rounds:
Round 1(NY): Resume + Finance terms + 1 LC Medium
Round 2(India): A System design question making a dictionary index, then some variations on concurrency.
Round 3(London): It was about greeks about options and futures and how does change,etc (basically financial stuff) and a hypothetical question
Round 4(HongKong): (Chill) if you have any questions about the project + behavourial questions .
Round 5(NY): Resume+ Probability and More questions about options, futures,etc(financial terms)
The whole process took about 3 months.