Top Nubank Behavioral Interview Questions (and How to Answer Them)

Question

Design Gurus · Accepted Answer

Nubank's behavioral interview is a competency round of about 30 to 45 minutes. Competency questions ask for specific past situations, not general opinions. Candidates report that the themes are ownership, accountability, teamwork, and the drive to challenge the status quo. Nubank also cares about its mission: making banking simpler and fairer. This answer lists ten questions grouped by theme, with guidance and one worked outline.

One rule improves every answer here. Interviewers score what you did, not what your team did. Tell each story with "I" for your own actions and "we" only for shared ones. Vague credit-sharing is the most common reason good candidates score low.

Ownership Questions

Tell me about a project you owned end to end. Show the full sequence: the problem, your decisions, the release, and the result with a number.
Tell me about a time something you released broke in production. Accountability is the signal. Say what failed, what you did in the first hour, and what you changed after. Do not blame a teammate or a tool. Interviewers stop trusting the story the moment you do.
Describe a time you took on work outside your role. Nubank teams are cross-functional. Show that you care about the outcome, not the job description.

Challenge Questions

Tell me about a time you challenged how your team did something. Candidates report that Nubank looks for people who question defaults. Pick a case with a measured improvement. A challenge that was rejected is fine too, if you accepted the decision well.
Describe a decision where you disagreed with your manager. Show respectful, evidence-based disagreement and a clear resolution.

Teamwork Questions

Tell me about a conflict inside your team and how it ended. Keep the story about the work. End with the decision and the relationship afterward.
How have you helped a teammate grow? Mentoring stories work well. Name the concrete change in the teammate's output. Nubank values collaborative, diverse teams, so teaching counts as real work here.

Mission and Motivation Questions

Why do you want to work at Nubank? This appears early and often. How to answer "Why do you want to work at Nubank?" gives a full structure and a sample answer.
Why fintech? Connect money software to something you value: correctness, fairness, or access. One personal detail makes it real.
Tell me about a time you made a decision with incomplete information. State the assumption you made and the check you ran afterward. Interviewers want calm judgment, not certainty. A sentence like "I wrote down the risk and set a review date" scores well.

A Worked Outline for the Most Important Question

Take question one, end-to-end ownership. Use STAR: Situation, Task, Action, Result.

Situation. "Our refund flow was manual. Support agents processed each refund by hand, and errors reached customers."
Task. "I proposed and owned an automated refund service. The goal was zero manual steps for standard cases."
Action. "I designed it as an event consumer with an idempotency key per refund, so retries could never pay twice. Idempotency means a repeated request has the same effect as one request. I wrote the tests first and released behind a feature flag."
Result. "Standard refunds went from two days to under one hour. Refund errors dropped to zero in the first three months."

Close with one reflection sentence. For example: "Owning the rollout, not just the code, is what made it work." That sentence shows accountability. Accountability is the exact competency this round scores.

How to Prepare

Write one story per theme. Ownership, failure, challenge, conflict, and mentoring. Each needs a number in the result.
Rehearse spoken answers. Aim for about two minutes each. Grokking Behavioral Interview teaches the method with worked examples.
Expect follow-up questions. Interviewers ask "what exactly did you do?" to separate your work from the team's. Use "I" for your actions.
Know the rest of the loop. Behavioral signals also come from the pair programming session. What is the Nubank interview process like? maps every stage.