I applied through their accelerator process so my experience may be more expediated. Started with an initial hirevue which asked typical Blackrock-themed questions about company mission, why Blackrock, innovation, etc. Then I had an interview with someone from the Portfolio Analytics team. A lot of typical behavioral and company questions but was thrown a probability question which I fumbled on but was ultimately able to get mostly right. Was a little weird because my interviewer didn't have his video on so I felt like I was just talking to a wall. He also didn't seem engaged as he kind of just asked me the questions without really doing follow-up. Felt like a one-sided convo. Came out of it feeling apathetic but heard I made it to the final round a week later. Final rounds were a mostly negative experience. Both of my behavioral interviewers were relatively new additions to the team but neither seemed passionate about their jobs or seemed to even like working on their teams that much. The interviews themselves were pretty easy, just asking typical teamwork/conflict resolution questions. My last "technical" interview was AWFUL. He literally asked me questions only to then mansplain programming concepts to me for the entire interview. Asked if I knew how to build a server, make a front-end application, the history of SQL, my open-source experience and a ton of other skills that were not pertinent to the actual job description. Barely even asked about my programming or analytical experience and then felt that it was necessary to go 15 minutes OVER the end of my interview to continue mansplaining his side projects in open-source. I politely said I wanted to be respectful of his time when we got close to the end, and he said "oh no worries we can go about 15 minutes over." He also stated this at the beginning of the interview, blatantly disrespecting my time without asking if I had any commitments afterwards. He also sat incredibly close to the camera and openly seemed to disregard anything I said, only really focusing on speaking on his own projects. The only reason he stopped the interview is because the other interviewers/recruiters messaged him. I felt frustrated because I felt that he spent the entire interview flexing his own background and being surprised when I hadn't built my own server when the job description just required beginner/intermediate python/R analytical skills. In other words, very little of the interview was actually spent evaluating my skills. I said maybe a total of 20 words. More of it was him asking "do you know (vague unrelated topic)," me stating that I had minimal experience in that realm because it WASN'T IN THE JOB DESCRIPTION and then him mansplaining it to me. Nobody should have to listen to their interviewer explain the history of SQL for 10 minutes of a 30 minute interview. Blackrock did offer some fun storytelling workshops and diversity & inclusive sessions as part of the final round but that doesn't negate the awful interview experience. I didn't receive an offer, which is not surprising considering that my last interviewer literally gave me no opportunity to talk, but I consider that a bullet dodged.

Applied online and got invited to a pre-recorded interview, they asked 4 questions, where you had 30 secs to prepare for each one and then around 2 min to answer. Overall took around 10 minutes. They also gave a chance to do some test questions before to get familiar with the system.