I applied through a recruiter. The process took 4 weeks. I interviewed at Datadog in Apr 2022
Interview
Around 5 steps interviews with a take home project to give back within a week. It took me more than a month to finish all the interviews.
The technical recruiter was very helpful, the person briefed me before each interviews (what was expected of me ...) which helped me to prepare for each of them.
All the interviewers were very nice and friendly. The frontend system design interview was really close to a real use case ("how would you design this specific feature using React?" ...)
Overall, it was a great experience!
I applied through an employee referral. I interviewed at Datadog (Paris) in Oct 2025
Interview
1 HR screening ( 30 min )
Then
1 Initial coding interview (45 min)
Then
Onsite React interview (1h)
Frontend System design interview (1h)
System design interview ( with something I actually worked on ) ( 45 min )
Behavioral interview ( 45 min )
Interview questions [1]
Question 1
Usual behavioral interview questions : tell me about a time you failed/mentored/delivered under pressure etc...
First I had a session with HR to understand if we were aligned. After that, there was a coding interview, with 2 interviwers and a leet-code like exercise. They send a very detailed email clarifying what we should know to succeed in the interview.
The process took 2 weeks. I interviewed at Datadog (London, England) in Jul 2024
Interview
The interview process included an initial Zoom with a recruiter, followed by a technical interview with a senior engineer. The final stage was a video interview involving both behavioral questions and technical challenges.
Interview questions [1]
Question 1
I was asked to solve a modified version of the LeetCode coin change problem, where I had to return the count of each coin used to make the minimum amount.
