Atlassian Software Engineer Interview Questions
The short answer
Atlassian's software engineer loop consists of a recruiter screen, a Karat technical screen, and four onsite rounds: coding, code design, system design, and values. You will face real-world design tasks, algorithmic problems, and a strict behavioural assessment. The process is language-agnostic and takes three to six weeks, prioritising clean code, self-driven testing, and alignment with their five core values.
A guide to Atlassian's software engineering loop, detailing the Karat screen, code design, system design, and values assessments.
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The Atlassian Software Engineer interview process
Atlassian's software engineering loop is highly standardised and fully virtual under their Team Anywhere model. It balances core algorithmic competency with real-world code craftsmanship and a non-negotiable values assessment. Expect to write code in your local IDE and explain your architectural trade-offs under scale constraints.
Typically 3 to 6 weeks from recruiter screen to offer, though scheduling and hiring committee reviews can extend this to 2 to 2.5 months.
Recruiter Screen
30-minute conversational video or phone call.
- High-level role fit and engineering background
- Interest in Atlassian and level placement mapping
- Logistical alignment on location and salary expectations
This call is used to map you to internal P-levels before technical scheduling begins.
Karat Screening Round
60-minute session conducted by a third-party Karat interviewer.
- Core CS fundamentals including networking, databases, and OS basics
- Speed and accuracy on 1-2 algorithmic coding problems
- Basic UI recreation for frontend-specific candidates
Atlassian offers a unique redo policy where you can request a second attempt within 48 hours if you underperform.
Coding and Data Structures Round
60-minute live virtual coding session with Atlassian engineers.
- Algorithmic correctness and clean, maintainable syntax
- Proactive, self-driven dry-running and testing of your own code
- Ability to vocalise and explain design trade-offs
Code Design and Craft Round
60-minute live programming session focused on real-world design tasks.
- Code modularity, clean naming conventions, and extensibility
- Object-oriented programming principles or functional decomposition
- Safe concurrency and multithreading handling using synchronisation primitives
The prompt is intentionally vague and undergoes mid-interview changes to assess how easily your class structure can be extended.
System Design Round
60-minute virtual interactive diagrammatic and architectural discussion.
- Scalability, data modelling, and API design
- Trade-offs under scale constraints
- Product-driven architecture tied to collaborate-at-scale enterprise software
Values Interview
45-60 minute structured behavioural interview.
- Alignment with Open Company, No Bullshit and Play, as a Team
- Alignment with Build with Heart and Balance and Be the Change You Seek
- Alignment with Don't #@!% the Customer
Conducted by an interviewer outside of the hiring team to minimise bias. This round acts as a hard gate.
What Atlassian grades across the whole loop
- Self-driven testing and dry-running code without being prompted
- Code extensibility and modularity over premature mathematical optimisation
- Alignment with the five core values, especially constructive and empathetic feedback
- Asynchronous communication and document-driven collaboration under the Team Anywhere model
12 Atlassian Software Engineer interview questions
These are drawn from what software engineer candidates report being asked at Atlassian. Under each one is what Atlassian is testing and what a strong answer actually contains — not what technique to use.
Coding and Data Structures
These rounds evaluate your algorithmic problem-solving and basic CS fundamentals. Atlassian cares deeply about how you test your own code and structure your logic.
“Lowest Common Ancestor of a Binary Tree”
Why they ask it
To evaluate basic tree traversal algorithms and your ability to handle edge cases like null nodes or missing targets.
What a good answer contains
A clean recursive or iterative solution where you dry-run the code with a custom test case before the interviewer asks you to.
“Rank Teams by Votes”
Why they ask it
To test your mastery of custom sorting logic and data structure manipulation in your chosen language.
What a good answer contains
Using a map or array to track votes per position, implementing a custom comparator, and explaining the time and space complexity clearly.
“Rapid-fire CS fundamentals covering networking, databases, and OS basics”
Why they ask it
To quickly gauge your breadth of core computer science knowledge during the Karat screen.
What a good answer contains
Direct, concise explanations of concepts like TCP vs UDP, indexing, or process vs thread without hesitating or guessing.
Code Design and Craft
This round focuses on real-world software design tasks rather than abstract puzzles. You will build extensible components and adapt to changing requirements.
“Implement a Sliding Window rate limiter.”
Why they ask it
To assess how you handle concurrent requests and test thread-safety using synchronisation primitives.
What a good answer contains
A modular class structure using thread-safe data structures like concurrent queues or locks, and a clean API design that handles edge cases gracefully.
“Design a system ID_Generator that generates unique IDs for different apps asking for the same... write two APIs, one for random output and one where the client has a preferred ID.”
Why they ask it
To test your ability to model components with changing requirements and handle conflicting constraints.
What a good answer contains
Defining clear interfaces, separating the generation logic from the storage/validation logic, and handling the preferred ID collision gracefully.
“Build an extensible UI component (for frontend candidates)”
Why they ask it
To evaluate component design, state management, and how easily your UI can be extended to support new features.
What a good answer contains
A highly modular component with clean prop interfaces, separation of concerns, and clear handling of asynchronous state changes.
System Design
You will design collaborative enterprise software. The focus is on scalability, data modelling, and product-driven architecture.
“Design a notification service for Jira or a real-time collaborative editor similar to Confluence.”
Why they ask it
To evaluate your ability to design real-time, highly available systems that integrate with complex enterprise workflows.
What a good answer contains
A decoupled architecture using message brokers for asynchronous delivery, and a clear strategy for handling document state synchronization or notification fan-out.
“Design a system where users tag various entities (e.g., Jira tickets, Confluence docs, Bitbucket repos) with hashtags, then retrieve all entities with a specific tag and identify the top 10 hashtags globally.”
Why they ask it
To assess your data modelling, indexing strategies, and how you aggregate high-throughput data in real time.
What a good answer contains
A schema that supports polymorphic associations, an efficient caching layer for the global top 10 list, and a write-heavy optimization strategy.
“Design a rate-limiting service for Atlassian APIs.”
Why they ask it
To test your understanding of distributed systems, caching, and protecting downstream services from traffic spikes.
What a good answer contains
A low-latency architecture using Redis for token bucket storage, handling race conditions with Lua scripting, and defining clear fallback mechanisms.
Values and Leadership
These behavioural questions assess your alignment with Atlassian's core values. They act as a hard filter in the hiring process.
“Tell me about a time you disagreed with a stakeholder. How did you handle it?”
Why they ask it
To test Open Company, No Bullshit and Play, as a Team values, ensuring you can disagree constructively and maintain healthy relationships.
What a good answer contains
An example showing emotional intelligence, where you used data-driven persuasion and chose the right timing and framing to deliver feedback with empathy.
“Describe a time you had to influence a stakeholder or teammate.”
Why they ask it
To evaluate the Be the Change You Seek value and your ability to drive technical ownership and alignment.
What a good answer contains
A scenario where you drove a change through collaboration, documentation, and consensus-building rather than pulling rank or winning an argument.
“Tell me about a time you had to balance delivering a feature quickly versus ensuring long-term code quality.”
Why they ask it
To test Build with Heart and Balance and Don't #@!% the Customer by evaluating how you manage technical debt.
What a good answer contains
A realistic trade-off where you delivered immediate value to the customer while documenting and scheduling the refactoring of technical debt.
A worked answer, with the structure showing
This is written to be spoken, not read. Do not memorise it — take the shape and put your own experience through it.
The question
“Tell me about a time you disagreed with a stakeholder. How did you handle it?”
Senior Software Engineer, three years at a collaborative SaaS company.
Situation — 15 seconds
In my last role, our product manager wanted to bypass our automated testing suite to ship a critical feature two weeks early. He felt the risk was minimal because the manual QA passed.
Conflict & Empathy — 20 seconds
I understood his pressure to meet the deadline, but skipping the automated suite meant risking regression issues in our core billing module. I didn't want to just say no bluntly; I wanted to show the impact with data.
Action & Collaboration — 30 seconds
I pulled historical data showing that 15% of our manual QA passes in that module had hidden regressions caught only by our integration tests. I proposed a compromise: we would run a targeted subset of the automated suite overnight, which took only 4 hours, and I volunteered to triage any failures first thing in the morning.
Outcome — 15 seconds
The PM agreed to the overnight run. We actually caught a critical edge-case bug that would have broken payments for 5% of users. We fixed it, shipped only half a day late, and established a new protocol for fast-tracking critical releases.
Reflection — 10 seconds
This taught me that Open Company, No Bullshit communication works best when paired with empathy for product constraints and concrete data, rather than just dogmatic engineering rules.
Why it works at Atlassian
- Directly demonstrates Open Company, No Bullshit by addressing the disagreement honestly, but avoids the mistake of brutal bluntness by showing deep empathy for the PM's deadline pressure.
- Highlights Play, as a Team by finding a collaborative compromise (the overnight test run) and taking personal ownership of the triaging process.
- Protects the user experience, aligning perfectly with Don't #@!% the Customer by preventing a critical payment regression.
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Say your answer out loud. Get it scored.
Reading about the structure is not the same as saying it. Answer “Describe a time you had to influence a teammate to adopt a new technical practice or tool.” the way you would in the room, and get a score plus three specific fixes. Aim for 60-90 seconds.
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Practise these out loud with AI feedback
Reading the questions is not the same as answering them. Paste the actual Atlassian job posting and your CV, and prepare.fyi builds the twenty questions that loop is most likely to ask — then you answer them out loud, with a live AI interviewer and a scored breakdown of every answer.
What candidates get wrong in this loop
Underestimating the Values Round
Many technically strong candidates treat the behavioural interview as a formality, failing to map their experiences directly to Atlassian's core values.
Fix: Prepare specific STAR-method examples that explicitly highlight collaboration, customer empathy, and constructive feedback, mapping them to the five core values.
Confusing 'No Bullshit' with Bluntness
Candidates sometimes think Open Company, No Bullshit means they should boast about being brutally blunt or dismissive of others' ideas in past conflicts.
Fix: Frame your stories around constructive, empathetic communication. Show how you delivered difficult feedback respectfully and at the right time.
Over-optimising the Code Design
In the Code Design and Craft round, candidates often rush into complex, highly optimised algorithms that result in unreadable, monolithic code.
Fix: Prioritise clean naming, modular class boundaries, and extensibility. Write code that is easy to read and modify when requirements inevitably change mid-interview.
Atlassian Software Engineer interview: frequently asked questions
- How difficult is the Atlassian software engineer interview?
- The interview is highly structured and challenging, particularly due to the unique Code Design and Craft round and the strict Values filter. While the algorithmic coding is standard, you must write highly maintainable, extensible code and demonstrate strong alignment with Atlassian's cultural values to pass.
- What is the Karat redo policy at Atlassian?
- Atlassian allows candidates to request a redo of the Karat technical screening round if they feel they underperformed due to nerves or technical issues. You must request this within 48 hours of the initial interview, and Atlassian will use the higher of the two scores.
- Is the Atlassian coding interview language-agnostic?
- Yes. Atlassian's assessment framework focuses on problem-solving, learning agility, and code craftsmanship rather than specific language syntax. You can choose your preferred programming language, and minor syntax errors or missing semicolons will not penalise you.
- Does Atlassian require a take-home coding assignment?
- No, Atlassian does not typically use take-home assignments for software engineering roles. Instead, they use a 60-minute Karat screening round followed by live virtual coding and system design sessions during the onsite loop.
- What happens after the virtual onsite loop?
- Your interview feedback and code are submitted to an internal Hiring Committee for review. If approved, you will enter the team-matching phase to align your skills and preferences with open team roles, which can take anywhere from one to four weeks before an official offer is made.
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The questions every Atlassian round opens with
Each has the structure, example answers, and the same free grader.
Go deeper
How this page was put together
Compiled from public candidate reports, Atlassian’s own published material, and interview write-ups, last checked 6 August 2026. Interview loops change and vary by team, level and office — treat this as a strong prior, not a script. If something here no longer matches what you were sent, tell us and we will correct it.