I'm french. A head-hunter got my CV to G-Research. One week later, still through the head hunter, G-Research was "impressed" by the academic background, then wanted to submit a 90 min test. No any communication with G directly, even if I tried through social networks... I worked hard for the test, whereas I didn't get precise idea about the questions. I just knew that there were five parts, and I really was encouraged to read the first part of a book. Result: I didn't understand at all the spirit of the test, and hard working with the book was completely useless for the test. Unfortunately I didn't get it, and the result was still announced by the head-hunter.

The interview process consists of multiple stages with hard quantitative bars to be met. After CV screening, they send you their proprietary online assessment of 10 MC. Some questions seem unusual, some are intentionally tricky, but most are similar to standard quant brainteasers and you can pass if you have really grinded through standard material. Then, there is an online interview with a quant which will ask you technical questions in barrage. The bar probably depends on your answers' grades and how many questions you can answer. I did not expect some questions, so I was caught unprepared and I fumbled spectacularly.