The TTD interview process is long, but they admit it and were open upfront about what was involved.

Their interview process (for a Senior Software Engineer position in Sydney in 2016) was:

• 1/2 hour Skype interview with HR in US
• Hour interview at their Sydney office (easy questions)
• Take home coding task (no time limit)
• Review of coding task via Skype (1 hour)
• 2 hour Skype interview and algorithm test with a Senior Engineer in US
• Another 2 hour interview - this time an hour each with 2 more Senior Engineers in US
• Finally the same again - 2 hours, an hour each with 2 different Senior Engineers in US

For me, the whole process took about 6 weeks from start to end. I made it most of the way through, but on the penultimate interview they told me they would not be progressing my application any further. I've been told I got through the process a lot further than most.

My understanding is they review and adapt their whole interview process over time.

Everybody during the interview process was very professional, and you could tell they were passionate about their work at TTD.

Lots of the questions revolved around algorithms, and working out / discussing a solution with the interviewer. They seem to be after a particular fit for their team and a particular way of working.

Lots of the questions revolved around algorithms, and working out or discussing a solution with the interviewer.