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      Datadog

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      Frontend Developer Interview

      1 Dec 2021
      Anonymous interview candidate
      No offer
      Negative experience
      Easy interview

      Application

      I applied through an employee referral. The process took 4 weeks. I interviewed at Datadog in Dec 2021

      Interview

      Got an intro call with a recruiter, usual corporate stuff, not very interesting as a conversation. Then they took a week to tell me I'd be advancing into the first technical test (the process has at least 4 of these, including take home test, system design, "pairing"). It was focused on algorithms and they gave me study material for it (youtube/leetcode). The call started with ~20 minutes of one of the engineers asking questions from a script, it felt quite pushy, like trying to make me prove that I really had the experience I mentioned. Then moved onto the coding part. The test was a live coding interview using Coderpad with 2 engineers. One of them was silent for most of the call, the other one didn't actually help a lot. First problem was easy, I did it the "dumb" way first then improved it into something "smarter". I took a lot of time to explain my reasoning and thought process. I was happy when I made it work. At no point did I get lost or have to re-do work, some typos or missing return statements happened but I fixed them on the spot. This really felt like a success. Then out of nowhere, having less than 20 minutes left in the call they brought up another problem, a bit more difficult (it included a tree data structure and recursion). I had to rush to get it done, didn't get enough time to think about it and had to jump straigh into implementation. I was nervous, tired and eventually got blocked. I asked for help and one of the engineers (the one who was speaking) tried to help me but I feel he gave me a false hint? and that took me further away from my initial idea (which was the correct approach). They stopped me at 5 minutes left for the call, I couldn't really reach a working solution but the guy said I "was close" (I wasn't close, after the detour cause by his "hint"). Finally they asked for my questions but it all felt very impersonal so I didn't care much. The recruiter then took 6 days to come back to me and said they'd decided not to continue. To be honest I feel like dropping someone because they can't solve an surprise recursion problem is not the best of approaches for finding good candidate. These are all long-solved problems, knowing the solution says nothing about the quality of a candidate or what they can bring to the team. A real shame, but probably a place I wouldn't want to work for anyway.

      Interview questions [1]

      Question 1

      One easy algorithm problem. Then another one which was a bit more complex (requiring recursion).
      Answer question
      10

      Other Frontend Developer interview reviews for Datadog

      Frontend Software Engineer Interview

      25 Jan 2026
      Anonymous interview candidate
      Paris
      No offer
      Positive experience
      Average interview

      Application

      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...
      Answer question

      Frontend Developer Interview

      23 Mar 2025
      Anonymous interview candidate
      No offer
      Positive experience
      Difficult interview

      Application

      I interviewed at Datadog

      Interview

      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.

      Interview questions [1]

      Question 1

      Leetcode-like exercise comparing two strings.
      Answer question

      Frontend Developer Interview

      22 July 2024
      Anonymous interview candidate
      London, England
      No offer
      Neutral experience
      Average interview

      Application

      The process took 2 weeks. I interviewed at Datadog (London, England) in July 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.
      Answer question