Initial phone screen involving questions such as tell me about an interesting article you recently read in a tech blog. Asked to code a solution on a shared typi doc. They asked for a sudoku solution verifier. Next up a second interview at their london office

I had behavioral interviews and then 4 in person interviews. The behavioral was straightforward. There was also a data query interview where they taught you a new "language" and had you execute basic queries in it. Then there was a system design interview. I had two of these. The last one they asked me if I was deployed to the moon to identify new species of alien what kind of system would I build.