Atlassian requires graduate and intern software engineering applicants to clear a timed online coding test before any interview. Guides describe it as CodeSignal or HackerRank, and recent Australian reports name HackerRank, with two to four problems in about 90 minutes. This page covers what the Atlassian online assessment is, its format and timings, how it is scored, the rules to know before you start, how to prepare and a practice plan.
What the Atlassian online assessment is
Atlassian's early-careers guide says software engineer graduates must complete an online coding test within the stipulated time and must clear it to join the interview process, but does not name the platform. A January 2025 Brisbane intern report described easy to medium LeetCode-style questions on HackerRank, and a Sydney graduate report described four questions in 90 minutes. Treat the platform in your invitation as the authority.
For the loop that follows, see the Atlassian interview process and how to prepare for values interviews.
Format and timings
| Part | What it involves | Time and questions |
|---|---|---|
| Coding problems | Two to four easy to medium problems, sometimes with a debugging task | Commonly reported: about 90 minutes in total |
| Topics | Hash maps, heaps, graphs and topological sort, intervals, tries, sliding window and LRU-style design | Within the time limit |
Total: commonly reported as about 90 minutes; Atlassian does not publish a figure.
How it is scored
- Auto-graded on test cases; Atlassian says clearing the test is mandatory to reach interviews.
- Clean, well-structured code helps, because the code design interview later rewards the same habits.
- No cut-off is published.
Rules to know before you start
- Atlassian runs a virtual-first process for intern and graduate roles.
- Confirm the platform and time limit in your invitation.
- Outside help is not allowed.
How to prepare
- Practice medium problems on hash maps, heaps, graphs and intervals, aiming for about 25 to 35 minutes each.
- Do one CodeSignal-style and one HackerRank-style mock, since guides name both.
- Write readable code with clear names and small functions.
- Read Atlassian's values now; the values interview comes later in the same process.
A practice plan
- Day 1: read the platform's candidate guide and try its practice environment.
- Days 2 to 4: two timed problems a day in your test language, writing your own edge-case tests.
- Day 5: one full mock under the real time limit.
- Day 6: review mistakes and the input and output rules.
- Day 7: take the test in one sitting with a stable connection.
Related guides: what an online assessment is, the HackerRank assessment guide, Atlassian coding interview questions.
On the day, and the mistakes to avoid
- Check the platform, the allowed languages and the time limit in the invitation.
- Try the practice environment or tutorial so the editor and run buttons are not new.
- Use a reliable computer on a stable connection, with other apps and tabs closed.
- Read every problem before starting, and do the quickest ones first.
- Write and run your own edge-case tests before submitting.
- Keep a few minutes at the end to check output formats and resubmit if needed.
Mistakes that cost candidates:
- Writing an elegant solution that fails large hidden tests because of its complexity.
- Mismatched output formats: extra spaces, prompts or debug prints.
- Spending most of the time on one hard problem while easier points go unclaimed.
- Pasting code you did not write, which integrity settings can flag.
- Not reading the input limits, so a solution that works on samples times out.
What happens after the Atlassian online assessment
If you pass, the next stage is usually a technical interview, and some interviewers ask about your assessment solution. Be ready to explain your approach and its complexity out loud, and prepare two or three behavioral stories for the conversations that follow. For the next stage, see software engineer behavioral answers.
Where CoPilot Interview fits
Online assessments are tests you take on your own: outside help is not allowed, and proctoring settings can flag other apps, tab switches or a second voice. Practice beforehand instead. CoPilot Interview is an AI interview assistant; its free AI mock interview prepares you for the interviews that follow the assessment, with questions built from your résumé and the job description and each spoken answer scored out of ten. The free plan gives 15 minutes a day of live help in sessions of up to 15 minutes, with AI mock interviews included. Read the invitation carefully and follow your employer's rules.
Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.
Frequently asked questions
Does Atlassian use CodeSignal or HackerRank?
Atlassian does not say. Guides name both, and recent Australian intern and graduate reports name HackerRank.
How long is the Atlassian OA?
Commonly about 90 minutes for two to four problems.
What comes after the Atlassian OA?
Three or four virtual interviews: craft-specific technical interviews, a leadership interview and a values interview, according to Atlassian.
What is the Atlassian values interview?
A behavioural and situational conversation about how your thinking and actions match Atlassian's company values. Prepare specific stories using the STAR method.
Can I use AI tools during the Atlassian online assessment?
No, unless the instructions explicitly allow it. Assessments are meant to be taken on your own, and proctoring settings can flag other apps, tab switches or pasted code. Use AI tools to practice beforehand, and follow your employer's rules.
Practice this interview before the real one
The AI mock interview builds questions from your resume and the job description, reads them aloud and scores each spoken answer out of 10. Included on the free plan.
Start a mock interview