After an informational call and submitting my resume, I did a technical aptitude test, which involved playing a tower defense game. I did not progress to the next step in the interviewing process, as I accepted a different opportunity.

Rigorous but fair questions - mostly case based. Two sets of interviews x 2 rounds. You only get invited back for the afternoon if you pass the morning round. They expect a high degree of mental math and creativity. Worth prepping for standard case interview style questions, using frameworks but able to adapt them.