I applied in Apr 2019 for New York positions. Heard back after about 2 weeks after application. The whole process took 2 weeks. The projects they gave are time consuming.

The interview process is rigorous, but it gives you a great idea of what your actual work will look and feel like. If you don't enjoy the assignments, you won't enjoy the work. There are two take home assignments followed by a day of three or four live interviews if you do well on the assignments. The first assignment is a quick screening tool, but still requires some thought and attention. The second assignment is complex and and probably the most important part of the interview process. It takes a good deal of time to complete, but it is a great representation of the work you will actually be doing on the job. If you hate the assignment, or find it tedious or boring, you won't like the job. (As a side note, I see another review complaining about "gross" vs "net" billings. Companies often have their own definitions for financial metrics, which you can look up very easily in their financial filings. A certain company defines gross billings as "gross amounts...net of estimated refunds.") In the live interviews, you go over the take-home assignment in one and then the others are typically standard behavioral interviews. There's nothing tricky in the live interviews, but they're important.

Submitted my resume online and heard back shortly after. First round was a short data assignment you need to complete in two days. I made a mistake but was able to correct it after asking for feedbacks. They were kind enough to give me a second chance to move forward. So don't give up! Second round was a 30-min call with the HR coordinator about my resume and background. Third round was a group info session where the VP of product talked about the company and the DPA role. If you're in NYC you will be invited to the office; otherwise you will join via Zoom. Fourth round was a much more complicated assignment and is also the most important part of the interview process. I needed to finish a report and send it back in a week. Took a lot of my time. After I sent in my report, there were 2 rounds of follow-up questions, each took about a week. Final round was an onsite interview with 4 people - 1 engineer, 1 research analyst, the VP of product and one of the cofounders. Mostly behavioral and background questions. Worked through a small case with the VP. Overall it was one of the best interview experiences I've had. They were very responsive and I got a good sense of what the job entails.