What Do Candidates on Reddit Say About the Datadog Interview?
Candidates on Reddit describe a Datadog loop with three stages: a recruiter call, a technical screen, and a virtual onsite of four to five rounds. One of those rounds is behavioral and centers on Datadog's published values. Candidates report a total timeline of three to five weeks.
Reddit is useful for the shape of the process. It is weak evidence for difficulty, because people who were rejected post more often than people who were hired.
The Loop as Candidates Describe It
| Stage | Length | What candidates report |
|---|---|---|
| Recruiter call | 30 minutes | Background, level, location, salary range |
| Hiring manager call | 30 to 45 minutes | Team fit, past projects, why Datadog |
| Technical screen | 60 minutes | One or two coding problems in a shared editor |
| Onsite coding | 45 to 60 minutes each | Two rounds, medium difficulty, practical style |
| Onsite system design | About 60 minutes | Monitoring, ingestion, or storage questions |
| Onsite behavioral | 45 minutes | Values, conflict, ownership, feedback |
Not every role gets every stage. New graduate loops are usually shorter and skip the design round.
What People Say About the Coding Rounds
Candidates report problems that look like real work rather than puzzles. Parsing, string handling, data structure design, and small simulations come up often.
Several posts mention being asked to run the code and handle edge cases. Write a test case before the interviewer asks for one.
The difficulty is usually described as medium. The bar people report is clean, working code with a stated complexity, not the cleverest solution.
Behavioral Questions People Report
The behavioral round maps to Datadog's values. These questions repeat across threads.
- Tell me about a time you disagreed with a teammate. What did you do?
- Describe a project where you had to ship something smaller than you planned.
- Tell me about a bug that took you a long time to find.
- Describe feedback you received that was hard to hear.
- Tell me about a decision you made with incomplete information.
- Why Datadog, and why this team?
Answer each one with a structure. Say the situation, your task, the actions you took, and the result with a number. Keep each story under two minutes.
How to Read Reddit Threads Safely
Reddit posts are anonymous and undated in practice. Use them for three things only.
- Process shape. How many rounds, and in what order. This is usually accurate.
- Question style. Practical coding over puzzle coding. Also reliable.
- Tooling. Which shared editor was used, and whether a camera was on.
Ignore three things. Ignore salary numbers without a level attached. Ignore any claimed pass rate, because no company publishes one. Ignore a single angry post about one interviewer.
What the Interviewers Are Scoring
Datadog builds monitoring tools, so the work is about systems that must stay up. Interviewers look for evidence that you behave well when something breaks.
That means you say what went wrong, not only what went right. It also means you name the people who helped you. Candidates report that ownership and openness are the two themes that come up most.
How to Prepare
- Practice the coding patterns, not random problems. Grokking the Coding Interview covers the patterns that cover most medium questions.
- Write six stories before the loop. Grokking Modern Behavioral Interview shows the structure and the common traps.
- Prepare the design round with monitoring questions. See Datadog system design interview questions for the list.
- Know the full process before the recruiter call. Read what the Datadog interview process looks like.
- Have a written reason for wanting the job. Why do you want to join Datadog covers the values and a sample answer.
- Set your expectation on difficulty. Is the Datadog interview hard compares it to other loops.
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