It was the algorithms interview. The HR warned me that there would be two algorithmic questions, but during the actual interview, they presented me with only one. I solved that one and asked about the second. The interviewer told me that there wouldn't be a second one. After the interview, I was rejected. The reason given was that I didn't solve the second question, but there was no second question. This was the worst experience I've ever had.
Algorithm question.
Level of difficulty is easy. You can find a lot of that kind of questions on LeetCode.
The following metrics were computed from 1 interview experience for the Datadog Front-End Engineer role in Madrid, Spain.
Datadog's interview process for their Front-End Engineer roles in Madrid, Spain is extremely selective, failing the vast majority of engineers.
Candidates reported having very negative feelings for Datadog's Front-End Engineer interview process in Madrid, Spain.