Katkat

Company

Nubank interview questions

3 practice questions in the style of Nubank's interviews, covering System Design.

Questions3

1 easy2 medium0 hard

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Nubank interview questions by the numbers

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Katkat has 3 Nubank interview questions. The largest topics are System Design (100%). By difficulty: 33% easy and 67% medium. The most common round is Onsite (67%). Frequent concepts include System Design, Distributed Systems, Fintech and Batch Processing.

Topics

Difficulty

  • Easy33% · 1
  • Medium67% · 2

Interview rounds

  • Onsite67% · 2
  • Technical Screen33% · 1

Roles

  • Software Engineer100% · 3

Frequent concepts

  • System Design100% · 3
  • Distributed Systems67% · 2
  • Fintech67% · 2
  • Batch Processing33% · 1
  • Data Pipelines33% · 1
  • Event-Driven33% · 1

Showing 1–3 of 3 results

  • Design Chargeback Ingestion and CSV DeliveryMedium

    Tests the ability to design an end-to-end financial transaction pipeline that ingests, deduplicates, and validates chargeback events, then reliably batches and delivers immutable CSV files to external card schemes via SFTP.

    NubankSoftware EngineerSystem DesignOnsite
  • Design a chargeback ingestion and export systemEasy

    This question assesses the ability to design a distributed system that reliably ingests high-volume transaction records and prepares them for periodic downstream delivery while ensuring data consistency and auditability.

    NubankSoftware EngineerSystem DesignOnsite
  • Design an Online Coding Competition PlatformMedium

    Design a scalable online coding contest platform capable of securely executing untrusted user code, producing deterministic scores, and maintaining both a real-time top-100 leaderboard and exact rank lookups.

    NubankSoftware EngineerSystem DesignTechnical Screen

Nubank interview experiences

All 1 →
  • Chargeback Ingestion and a Database Read BottleneckNubank · Software Engineer · Senior+ · Onsite · Sep 2026
    Rejected

    Problem: Design a Chargeback Ingestion System Design a system that processes card chargeback/dispute transactions. The system receives chargeback-related transaction events, validates and deduplicates them, tracks their processing state, persists them, and eventually exports eligible transactions into CSV files. These CSV files must be sent to Mastercard via FTP/SFTP. The difficulty felt all righ…

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