Data Engineering
ETL · Spark · streaming · warehousing
What this skill is about
ETL · Spark · streaming · warehousing
Topics we drill
- Batch vs streaming pipelines
- Spark + DataFrame internals
- Star/snowflake schemas
- Data quality + lineage
- Lakehouse architectures
Why this matters at interviews
Real interviewers don’t just check if you know the syntax — they probe whether you’ve used the concept under production pressure. Our drills mirror that. Adaptive difficulty, named anti-patterns called out as you go, and a senior-staff voice that teaches the production vocabulary rather than dumbing it down.