Tell me about a time you disagreed with a teammate. How did you handle it?
Reported in SumUp European engineering loops. Behavioral STAR question assessing collaboration and conflict resolution.
Interview scenario
Often asked in SumUp loops at European offices (London, Berlin, Amsterdam, Paris, Stockholm, Dublin, and remote EU). Prepare a clear spoken answer plus key trade-offs.
Model answer
Try answering aloud first
Cover trade-offs, structure, and a concrete example before revealing the baseline response.
How to frame this at SumUp: Connect your answer to measurable impact, clarity of thought, and trade-offs the team cares about. Below is a strong baseline response you can adapt with your own project examples.
Use STAR (Situation, Task, Action, Result) with a real, professional example—never blame others.
Situation: Brief context—e.g., sprint planning debate on microservice split vs monolith module.
Task: Your responsibility—deliver feature on deadline while maintaining architecture quality.
Action: Data-driven steps—scheduled design review, listed trade-offs (latency, deploy risk, team familiarity), ran spike/prototype, sought tech lead mediation, agreed on phased approach.
Result: Quantify—shipped on time, reduced incidents, documented ADR for future teams. Reflect on what you learned about assuming good intent and separating ideas from ego.
Discussion
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