The Trade Desk interview questions

I designed a generic cache library, exchanged 30+ emails about design decisions with the technical hiring manager, and attended two onsites. The interviewer, who was previously at a hedge fund, was incredibly arrogant, and appeared threatened by my knowledge of distributed systems architecture. TTD uses a .NET stack, but I implemented my solution in Java as I do not have C# experience. The questions in the onsite almost primarily related to the coding challenge (which we’d already exchanged a glut of emails about.) I provided ample examples of how to abstract the architecture to a distributed cache (from a local cache) and provide multi-tier resiliency. The conversations broke down when the hiring manager asked my compensation. It was a mistake for them not to have asked this earlier, and the hiring manager decided to end the process after that interview. They could have said I was not a cultural fit or that my comp was too high. But instead, they said I was not technically knowledgeable. Stay away.

Phone call with the recruiter, then received a 1 month code challenge to develop a caching library through hackerrank. You receive a very vague description of the exercise, and they're expecting you to ask questions. Not asking questions can get you disqualified on it's own. Don't try to sound too smart in questions or in your solution by implementing more than what's asked, depending on who's interviewing you this can be big factor against you.