d.depthfirst/
THE LEARNING LIBRARY

Build your understanding
from the foundations.

One complete guide. Six connected topics. Read the explanations, follow the diagrams, and check what you understand.

THE DATA ENGINEERING FIELD GUIDE

Six foundations.
One stronger engineering instinct.

Understand the failure modes behind reliable data systems, with detailed explanations, diagrams, and questions that test your understanding.

Read the complete guide
  1. 01Idempotency & safe reruns
  2. 02Dimensional modeling
  3. 03Lakehouse table formats
  4. 04Streaming & event time
  5. 05Data quality & contracts
  6. 06Privacy engineering

Preparing for a cloud data engineering interview?

Azure interview prep ↗GCP interview guide ↗
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