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Citadel·Software Engineer·Technical Phone Screen·Intermediate

Intermediate
Apr 2026

Summary

Citadel software engineer interview that covered a resume walkthrough and a behavioral conflict question. Nothing too surprising but the conflict question needed more preparation than I gave it.

Questions Asked (2)

Q1

Walk me through your resume, focusing on the projects and decisions most relevant to this role.

Technical Trade-offsAdaptability & Ambiguity
Author's notes

I'd done this a dozen times before so I wasn't worried, but Citadel pushed harder on the 'decisions' part than I expected.

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AI HintsAI Generated

Suggested Approach

Structure your resume walkthrough as a narrative that connects your past experiences to the specific demands of this role, emphasizing technical trade-offs and adaptability in ambiguous situations. Focus on 2-3 projects where you made impactful decisions, and briefly mention other roles to show career progression.

Pro tip: Quantify the impact of your decisions (e.g., 'reduced latency by 30%') and be ready to dive deep into any project you mention, as Citadel interviewers often probe for technical depth and trade-off analysis.

1. Set the Stage

Start with a brief overview of your career trajectory, highlighting key themes (e.g., distributed systems, low-latency optimization) that align with the role.

2. Deep Dive into Relevant Projects

Select 2-3 projects most relevant to the role and describe them in detail, focusing on your specific contributions, technical challenges, and the trade-offs you considered.

3. Highlight Adaptability and Ambiguity

For each project, mention a situation where requirements were unclear or changed, and explain how you navigated the ambiguity to deliver results.

4. Connect to the Role

Explicitly tie your experiences to the skills and qualities Citadel seeks, such as making data-driven decisions, optimizing performance, or collaborating in fast-paced environments.

5. Wrap Up with Career Progression

Briefly mention other roles or projects to show growth and breadth, then conclude by expressing enthusiasm for applying your skills to this position.

Key Points to Mention

  • Specific technical trade-offs you made (e.g., consistency vs. availability, latency vs. throughput) and their outcomes
  • Examples of adapting to changing requirements or ambiguous problem statements
  • Quantifiable impact of your work (e.g., performance improvements, cost savings, user growth)
  • Collaboration with cross-functional teams or leadership in driving projects
  • Relevance of your skills to Citadel's tech stack or business domain (e.g., high-frequency trading, data analysis)
  • A clear and concise narrative that avoids jargon and keeps the interviewer engaged

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

Q2

Tell me about a time you had a conflict with a teammate. What was the situation, what did you do, and how did it resolve?

Conflict ResolutionCross-functional Alignment
Author's notes

I had a story ready but it was kind of weak, more of a 'mild disagreement' than a real conflict.

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AI HintsAI Generated

Suggested Approach

Choose a real, low-stakes technical disagreement (e.g., code review, design choice) where you stayed objective and focused on the work, not the person. Use a clear STAR structure to show how you listened, separated facts from opinions, and drove a resolution that improved the outcome. End with what you learned and how it strengthened the team or your collaboration.

Pro tip: At Citadel, they care about intellectual honesty and low-ego collaboration—frame the conflict as a technical disagreement you resolved with data and a willingness to be wrong, not as a personal clash. Avoid blaming the teammate; emphasize how you made it safe to disagree and kept the relationship strong.

1. Set the context briefly

Describe the project, your role, and the teammate's role in 1–2 sentences so the interviewer understands the stakes. Keep it concise and avoid unnecessary backstory.

2. Explain the disagreement objectively

State the technical or process conflict in neutral terms—what each side proposed and why. Focus on the issue, not personalities, and show you understood the other person's perspective.

3. Describe your actions to resolve it

Explain how you listened, asked questions, and used data or experiments to evaluate options. Highlight collaboration: e.g., you proposed a quick prototype, sought a third opinion, or agreed on criteria for a decision.

4. Share the resolution and outcome

State how the conflict was resolved—whether you adopted their idea, found a compromise, or escalated appropriately. Quantify the impact if possible (e.g., reduced latency, avoided a bug, met a deadline).

5. Reflect on the learning

Summarize what you learned about communication, humility, or decision-making, and how it improved your ability to work with others. Keep it forward-looking and positive.

Key Points to Mention

  • Stayed calm and objective, focusing on the problem rather than the person
  • Actively listened to the teammate's perspective and asked clarifying questions
  • Used data, experiments, or objective criteria to evaluate options
  • Involved a neutral third party or manager only when necessary and appropriate
  • Maintained a positive working relationship and psychological safety
  • Demonstrated growth: what you learned and how you applied it later

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