The recruiter set up a technical phone screen. The phone screen was a typical crapshoot that you find in the HFT space: either you know the answer to some specific problem the interviewer is an expert on, or you get passed on. In the end, the interviewer learns very little about your actual skills.
What parts of C++11, C++14, and C++17 have you used?
Explain, down to the hardware level, what a SIGSEGV is, what causes it, and how it is generated.
Give an algorithm to find the kth largest element in an unsorted vector of integers.
This is more for the HR team:
The following metrics were computed from 1 interview experience for the Hudson River Trading Senior Software Engineer role in Chicago, Illinois.
Hudson River Trading's interview process for their Senior Software Engineer roles in Chicago, Illinois is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Hudson River Trading's Senior Software Engineer interview process in Chicago, Illinois.