← Atlassian Interview Insights

Atlassian·Machine Learning Engineer·Onsite - Behavioral / Leadership·Senior

Senior
May 2026

Summary

Behavioral round at Atlassian for an ML Engineer role. They pick apart your projects in real detail, not just the high-level story but specifically what you personally decided and why.

Questions Asked (2)

Q1

Walk me through a project you owned. What specific decisions did you make, and what was your individual contribution versus the team's?

Adaptability & AmbiguityCross-functional Alignment
Author's notes

The part that tripped me up was how persistent they were.

Create a free account to read the full note

AI HintsAI Generated

Suggested Approach

Choose a project where you drove key ML decisions from problem framing to deployment, and structure your answer as a narrative that highlights your individual ownership while acknowledging team collaboration. Use the STAR method to describe the situation, your actions, and the results, explicitly calling out decisions you made and how you influenced cross-functional partners.

Pro tip: Quantify your impact and be precise about your contributions—interviewers at Atlassian value clarity and humility, so avoid overclaiming; instead, explain how you enabled the team's success through your specific actions.

1. Set the context and goal

Briefly describe the project, its business objective, and why it mattered. Mention the team composition and your role to establish scope.

2. Highlight key decisions you owned

Walk through 2-3 critical technical or strategic decisions you made (e.g., model selection, data strategy, trade-offs) and the reasoning behind them.

3. Clarify your individual contribution

Explicitly state what you did versus what the team did. Use 'I' for your actions and 'we' for team efforts, and describe how you collaborated with others.

4. Show adaptability and cross-functional alignment

Explain how you navigated ambiguity or aligned with stakeholders (e.g., product, data engineering) to keep the project on track.

5. Share outcomes and learnings

Quantify the results (e.g., model accuracy, business impact) and reflect on what you learned or would do differently.

Key Points to Mention

  • Specific ML decisions: model architecture, feature engineering, evaluation metrics, or deployment strategy
  • Trade-offs considered: latency vs. accuracy, cost vs. performance, or build vs. buy
  • Your individual ownership: leading a workstream, writing code, designing experiments, or making final calls
  • Collaboration with cross-functional teams: how you communicated with product managers, engineers, or stakeholders
  • Handling ambiguity: how you defined the problem, iterated, or adapted when requirements changed
  • Measurable impact: quantitative results (e.g., improved F1 score, reduced inference time, business KPIs)

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.

Q2

What did you actually learn from that project, and how has it changed the way you work?

Adaptability & AmbiguityTechnical Trade-offs
Author's notes

Felt like a soft question until I realized they were using it to test whether my earlier answers were real.

Create a free account to read the full note

AI HintsAI Generated

Suggested Approach

Choose a project where you faced significant ambiguity or had to make a tough technical trade-off, and clearly articulate the specific lesson learned. Then, explicitly connect that lesson to a concrete change in your current ML workflow, such as a new practice or decision-making heuristic. Keep the focus on growth and self-awareness, not just project details.

Pro tip: Frame the lesson as a transferable principle that improves your engineering judgment, and show how you've applied it in a subsequent project to demonstrate lasting impact.

1. Set the context briefly

Describe the project in 1-2 sentences, highlighting the ambiguity or trade-off you faced, so the interviewer understands the stakes.

2. State the key lesson

Clearly articulate what you learned—focus on a principle or insight, not just a technical fact. For example, 'I learned that early alignment on evaluation metrics saves weeks of rework.'

3. Explain how you changed your approach

Describe the specific behavior or process you adopted after the project. For instance, 'Now I always start ML projects by defining success metrics with stakeholders.'

4. Provide evidence of impact

Give a concrete example of how this change improved a later project—e.g., faster iteration, better model performance, or smoother collaboration.

5. Connect to the role

Relate the lesson to the ML Engineer role at Atlassian, emphasizing how it helps you navigate ambiguity and make better technical trade-offs.

Key Points to Mention

  • A specific project with clear ambiguity or trade-off (e.g., choosing between model complexity and interpretability)
  • The exact lesson learned, framed as a transferable principle
  • A concrete change in your workflow (e.g., new documentation practice, prototyping approach, or stakeholder communication)
  • Evidence that the change led to better outcomes in a subsequent project
  • How this experience prepares you for challenges at Atlassian (e.g., scaling ML systems, cross-team collaboration)
  • Demonstration of self-awareness and continuous improvement

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.