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Data & AI

How to hire a Data Engineer

What the role does, the job description, the interview questions, and the 40-minute screening pack that tells you who can do the job before you book a single interview.

The role

What a Data Engineer does

A Data Engineer sits in the Data & AI function. The sections below give you the job description, the interview questions and the screening pack for the role.

Screen before you interview

The Data Engineer screening pack

ETL, modelling, distributed processing and SQL are the core of the job. Every applicant gets one link. You get one ranked report.

One-way video questions · answered on camera, scored by AI
  1. 1

    Describe a pipeline you built end to end. Where did it break first?

  2. 2

    How do you design a schema for analytics versus for an application?

  3. 3

    How do you handle late-arriving or duplicate data?

  4. 4

    What do you monitor in production, and what wakes you up at night?

  5. 5

    Batch or streaming for our use case? Argue it.

Send this pack to your applicantsFree plan, 10 candidates a month, no card.

Interview questions

Data Engineer interview questions

For the candidates who pass the pack. Each comes with a sample answer on the full page.

Ask these after the screening pack, not instead of it. A candidate who has already scored on Data Extraction, Transformation and Loading, Data Modeling Concepts, Apache Spark, PostgreSQL has shown they can do the work, which frees the interview to do what a test cannot: find out how they think, how they explain themselves, and how they behave when something goes wrong.

  • Ask every Data Engineer candidate the same questions in the same order. Comparable answers are the whole point; a different conversation with each person tells you who you liked, not who was strongest.
  • Look for a specific example with a result, not a description of how the candidate would approach it in principle. Follow up once with “what happened next?” and stop talking.
  • Score each answer before moving to the next question, and write down what was said rather than the impression it left.
  • At volume, record the first 4 of these instead of calling. Candidates answer on their own time, the answers are transcribed and scored, and you keep live interviews for the shortlist.

The pack takes a candidate about 40 minutes, so a Data Engineer applicant arrives at this interview already measured on the parts you can measure without a meeting.

  1. 01

    What attracted you to data engineering?

  2. 02

    Tell me about your background and the data platforms you have worked with.

  3. 03

    What kind of data platform maturity are you looking to join?

  4. 04

    How do you keep your engineering skills sharp?

  5. 05

    How do you design a data pipeline to be reliable and maintainable?

  6. 06

    Explain how you approach data modeling in a warehouse.

  7. 07

    How do you decide between batch and streaming for a given use case?

  8. 08

    How do you ensure and monitor data quality?

All Data Engineer interview questions with answers

Frequently asked questions

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