Four interviews with, in order: a manager, a principal, a partner and then head partner. All interviews were motivation/industry understanding/walk me through your CV. They were curious about my coding skills and I got asked multiple times how my coding skills would suit this job,

I was asked to join a couple interviews, one with the manager and one with each member of the team. Everyone was very personable and the interview process was reasonably difficult. They asked me questions about how I approach different actuarial lines and methods.