The Data Foundry
Built by Data with Pranjal
All Practice
Choose a guided lab or practice track
Scenario Playground
Broken pipelines, logs, and debugging cases
SQL Lab
Interview SQL with real data and validation
Python Lab
Data engineering Python practice
PySpark Lab
Spark code review and production fixes
System Design Studio
Architecture trade-offs and interview framing
Onboarding
Answer four questions and The Data Foundry will recommend a focused plan. This v1 stores your path locally and keeps the product lightweight.