Was experienced, asked directly about how prior company did certain trades, what kind of technology, etc. Seemed a bit pushy and aggressively asking numerous different times for IP. Other part was a relatively simple coding sequence. Was asked followups about specifics of computer science.

Mainly asking questions on experience in the markets, approach to different techniques quantitative and otherwise, and then general critical thinking skills, even as applied to games. Very friendly interviewers and got to know the owners during it.