Marshall Wace Data Engineer interview questions

I had not experienced such poor manners from a hiring manager, ever, this is in their London office. I initially was reluctant to proceed with them because another recruiter in the past forwarded my CV but heard nothing back, however this recruiter was very keen because of the good fit of profile. After investing 2 hours in a timed Codility test, and providing a very clean solution that passes the tests, I was told that I am rejected because I 'Did not meet standard in Codility test'. I asked a couple of times for more detail and to double-check in case there was some issue on Codility; was told that hiring manager 'is too busy'. I was concerned that perhaps because I did the coding in my IDE, and copy-pasted the solution into Codility, it could have flagged up a plagiarism check. I still don't know what the issue was, even if it's a mistake on my part, other companies have sent me at least a bit of feedback before, so I was not so upset. Do not recommend this company. Thinking about them still leaves me with a bitter feeling.

They initially sent me a coding challenge online. In relation to Leetcode difficulties, this would be one Easy and two Mediums. I then talked to the hiring manager about my goals and why I wanted to join Marshall Wace, followed by two group interviews with folks from the team. I had an interview with the team lead before speaking with someone from HR, then someone from senior management. After that, they extended an offer.