Four rounds of interviews. The first was recruiter-based, high level analytics questions - just to see that you are actually an analytics professional. The second and third were with other analysts and had short case studies. The math was only algebra and the numbers weren't strange. They also ask some business questions about the math, such as what you would recommend for an ad based on the calculations you made. The final round of interviews was in person in Boston. You meet with 3 different groups of people. In my experience, the first was a behavior-based interview, the second was similar to the analyst rounds with algebraic questions, and the last was a 9-step math interview where you are given a complicated regression formula and asked to explain what each step was calculating and why it was important.

I could not complete all the steps due to unprofessional interview process management. Two different HRs contacted me. After I shared my availability for the next interview, they sent me 2 different emails which were not related to my interview process. I asked for clarification about the process and send me the correct slot, but I did not get an answer for 4 days. In the end, HR call me and said all of a sudden they decided to hold the hiring process for this position. I spent 2 days on the case study and this is really unprofessional. I had concerns about the company because of having a low rating on Glassdoor but now understood why people are complaining that much. 1- Codility Challenged -- passed 2- HR screening call -- passed 3- Hiring Manager -- passed 4- Case Study -- delivered but the position on hold