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ATLASSIAN · SDE 1

Atlassian SDE 1 interview

The SDE 1 (entry-level software engineer) level at Atlassian is P30 Graduate / entry Software Engineer, for new grads and engineers with up to about 2 years of experience. The rounds at this level, how each one is scored, and the questions to practise first.

From public candidate reports and Atlassian's careers pages, checked November 2026. Processes vary by team. AlgoRung is not affiliated with Atlassian.

Track my Atlassian prep
Atlassian titleP30 Graduate / entry Software Engineer
ExperienceNew grads and engineers with up to about 2 years of experience
Interviews after screeningAbout 3
System design roundYes

The SDE 1 rounds, in order

  1. Phone / recruiter screen · 30 min

    A recruiter call about background, motivation, location and pay, where the target level gets set.

    At SDE 1: Usually one medium problem. Explain your idea before coding and test by hand at the end.

  2. Online assessment · 90 min

    Intern and graduate candidates report a timed test with two or three DSA problems before any live interview.

    At SDE 1: The main filter for new grads and campus drives. Expect two medium problems, sometimes one hard. Passing all test cases on both usually gets you to the next round.

  3. Coding (DSA) · 60 min

    The 'Data Structures' half of the coding interview: an algorithm problem with follow-ups, scored on clean code, naming and testing your own work without being asked.

    At SDE 1: The largest part of the loop: often three coding rounds. Medium problems, sometimes one hard. Correct, clean code and clear reasoning matter more than speed.

  4. Low-level design / machine coding · 60 min

    The 'Code Design' half: build a small working component that can be extended, such as a popularity tracker, then handle new requirements, tie-breaks and concurrency.

    At SDE 1: Object-oriented design with clear classes and responsibilities. Working code matters more than patterns.

  5. Behavioral · 45 min

    The values interview, usually led by someone outside engineering, with roughly one question per value and probing follow-ups.

    At SDE 1: Stories from internships, projects or your first job are fine. Show learning, ownership and teamwork.

  6. Hiring committee

    An independent committee reviews all the feedback and the CV and makes the final call.

    At SDE 1: Mostly about whether the packet clears the bar; team match can take a few weeks.

What Atlassian interviewers look for

Behavioral rounds are based on the Company values: Open company, no bullshit, Build with heart and balance, Don't #@!% the customer, Play, as a team, Be the change you seek. Questions for each one.

Coding questions to practise for Atlassian SDE 1

The largest part of the loop: often three coding rounds. Medium problems, sometimes one hard. Correct, clean code and clear reasoning matter more than speed.

Difficulty
Topic
3 questions
  1. Lowest Common Ancestor of a Binary Tree Medium Trees & BST also Google, Meta, Netflix +1
  2. Merge Intervals Medium Intervals also Netflix, LinkedIn, Oracle
  3. Two Sum Easy Arrays & Hashing also Amazon, Microsoft, Swiggy

How the coding round is scored · The online assessment

System design at SDE 1

Every level gets a code design (LLD) round where you build and extend working code. P40 and above add an HLD round, usually framed around collaboration products like issue trackers and wikis. At P50 and P60 the bar shifts to deep trade-offs, scaling and cross-team impact.

All Atlassian system design questions

Questions people ask

How many rounds are in the Atlassian SDE 1 interview?

About 3 interviews after the screening: phone / recruiter screen, online assessment, coding (dsa), low-level design / machine coding, behavioral, hiring committee.

Is there a system design round for Atlassian SDE 1?

Yes. Every level gets a code design (LLD) round where you build and extend working code. P40 and above add an HLD round, usually framed around collaboration products like issue trackers and wikis. At P50 and P60 the bar shifts to deep trade-offs, scaling and cross-team impact.

What coding questions does Atlassian ask at SDE 1?

The same question pool is used across levels; the bar rises with level. Most reported: Lowest Common Ancestor of a Binary Tree, Merge Intervals, Two Sum.

What does Atlassian expect in coding rounds at SDE 1?

The largest part of the loop: often three coding rounds. Medium problems, sometimes one hard. Correct, clean code and clear reasoning matter more than speed.

SDE 1 interviews at other companies

SDE 1 interview questions across all companies · Behavioral questions