I applied online. I interviewed at G-Research (London, England) in Apr 2021
Interview
In all cases the interviewers seem quite nice except for one person who sat in watching and never introduced themselves.
First round was a 1 hour with a ~30min programming exercise and general chat about my experience.
Second round was supposed to be 3 one hour sessions but after two they had already decided to not bother finishing up and gave no feedback as to why. This seems in keeping with other reviews here so don't be surprised if it happens.
The interview process was thorough and well structured. It focused primarily on data structures and algorithms, and the level was broadly in line with what you would expect for a software engineering interview of this type. I cannot share specific details of the questions, but standard preparation in algorithms, data structures, problem solving, and coding under interview conditions should be sufficient. Overall, it felt rigorous but fair.
There were mostly algorithmic questions to be solved on a whiteboard. Then, after a lunch with a couple of the junior staff, the tell you whether you’re into the next round. There is also a test beforehand.
2-3 parts depending on team. Pretty in depth on topics. 2 coding rounds I believe. Interview process is fairly quick. It’s not a process that takes 3-4 weeks. 2 weeks max, 1 week if you’re really adamant.