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Adyen interview questions

4 practice questions in the style of Adyen's interviews, covering Machine Learning, Behavioral & Leadership, System Design, Coding & Algorithms.

Questions4

1 easy2 medium1 hard

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Adyen interview questions by the numbers

Last updated

Katkat has 4 Adyen interview questions. The largest topics are Behavioral & Leadership (25%), Coding & Algorithms (25%) and Machine Learning (25%). By difficulty: 25% easy, 50% medium and 25% hard. The most common round is Technical Screen (75%). Frequent concepts include Classification, Feature Engineering, Fraud Detection and Machine Learning.

Topics

Difficulty

  • Easy25% · 1
  • Medium50% · 2
  • Hard25% · 1

Interview rounds

  • Technical Screen75% · 3
  • HR Screen25% · 1

Roles

  • Software Engineer75% · 3
  • Machine Learning Engineer25% · 1

Frequent concepts

  • Classification25% · 1
  • Feature Engineering25% · 1
  • Fraud Detection25% · 1
  • Machine Learning25% · 1
  • Model Evaluation25% · 1

Most mentioned in interview experiences

  1. 1.Demonstrate ownership in a project deep dive1 report
  2. 2.Design scalable LRU cache and backtracking API1 report
  3. 3.Implement LRU and target-sum combinations1 report

Counted from 1 candidate interview experiences on Katkat. How we collect and count

Showing 1–4 of 4 results

  • Build a Payment Fraud Detection ModelEasy

    Tests practical machine learning design for payment fraud detection, covering data preprocessing, temporal validation splits, class imbalance handling, and metric selection.

    AdyenMachine Learning EngineerMachine LearningHR Screen
  • Demonstrate ownership in a project deep diveMedium

    Demonstrate ownership in a project deep dive evaluates behavioral evidence, ownership, communication, trade-offs, and measurable outcomes in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

    AdyenSoftware EngineerBehavioral & LeadershipTechnical Screen
  • Design scalable LRU cache and backtracking APIHard

    Design scalable LRU cache and backtracking API evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

    AdyenSoftware EngineerSystem DesignTechnical Screen
  • Implement LRU and target-sum combinationsMedium

    Implement LRU and target-sum combinations evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

    AdyenSoftware EngineerCoding & AlgorithmsTechnical Screen

Adyen interview experiences

All 3 →
  • Adyen Account Executive interview: missing customer contextAdyen · Account Executive · HR Screen · Jul 2026
    Withdrew

    Recruiting contacted me several times over about two months. Once I finally replied, the process followed a normal path: recruiter first, then a hiring-manager round that felt as though it went well. The third round surprised me because nobody had told me it would be a set of hypothetical, multilayered customer questions. I could speak at length about my own customers and had strong stories, but…

  • Adyen Software Engineer interview: unclear final communicationAdyen · Software Engineer · HR Screen · Jul 2026
    No response

    My interviews lasted a while, and the technical work was not the part that stayed with me most. I began with recruiter screening, then went through several rounds with technical discussion followed by leadership or manager-style conversations. At one point I was told I would be brought to the Amsterdam office for a leadership interview. That final round felt inconsistent with what I had shown ear…

  • 100% on the OA, Rejected After the Technical RoundAdyen · Software Engineer · Technical Screen · Jul 2025
    Rejected

    There isn't much Adyen interview experience on the forum, so let me contribute mine. I'd never heard of Adyen and didn't even know they hire in the US — they have an office in Chicago and require onsite for a few days. Interview process: HR -> HackerRank OA -> Technical -> System Design -> Leadership -> Board The OA had two questions: the first was LRU, the second was similar to combination sum,…

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