I applied online. The process took 2+ months. I interviewed at The Trade Desk (London, England) in Apr 2018
Interview
45mins call from HR. Then hiring manager call for 45 mins for technical questions.And then 4 interviews with 4 different people in same day.All revolves around culture fit. I really wished I got through. Was overall very positive experience.Only negative was that the whole process took almost 2.5 months for an answer.