First contacted via LinkedIn by a headhunter to set up a video call with them.

Started out listening to what TTD does within the ad tech space and how the ad industry has operated through history. Apart from that, I had a good amount of time to chat about my personal life. This came to about an hour.

Next, I got a take-home exercise that was quite fun to implement. I came from a TCL-based development background previously, so I thoroughly enjoyed researching C# and the problem domain with no time limit. I got to ask questions throughout with an assigned dev from the team, not just about requirement clarification but also had discussions. This was followed up with a code review where we discussed how I approached it and how we could improve it. A nice peek at how collaboration happens here.

Finally, I had two video calls consecutively with the US offices going through problems and two in-person at their London office, an hour each. Each interviewer tackled a different area of core developer skills that would be used.

Overall, I found that it was quite nice to have the open-ended take-home task whilst working. The interviews we set up were quite flexible with my personal life being taken into account (had holidays booked in the middle of the process). The best thing, though, were really the individuals giving the interviews. Apart from the questions, we discussed tech the company leverages, work environment, and previous places we had been at.

How would you approach distributing information to a large amount of machines in a data center?