Free notes · no sign-up to browse
The notes we actually revise from before interviews.
Spark, SQL, Kafka, Snowflake, Airflow, dbt, warehousing and system design, written as revision notes, not textbooks.
- Read the first 5 pages of any note, no sign-in
- Your first download is free with one Google sign-in
- All 85 notes with the Learn Pass, ₹499 for 6 months
Also included in any paid plan and every cohort seat.
- PDF notes
- 85
- pages of revision
- 2,195
- topics covered
- 21
Just launched · sold separately from the vault
Experienced Data Engineering Interview Kit 2026
The 11 decks:
- 01 SQL and modeling
- 02 Python coding
- 03 PySpark
- 04 Kafka and streaming
- 05 AWS, Azure and GCP
- 06 Databricks and Snowflake
- 07 Airflow, dbt and DataOps
- 08 System design
- 09 Scenario questions
- 10 Trade-offs
- 11 Behavioural and offer
₹499 · PDF · 20 pages free to read
New book · sold separately from the vault
Data Engineering System Design: Zero to Hero
- 100 reported questions from 30+ companies, each tagged by evidence
- The PIPELINE method: eight steps for the 45 minutes
- 26 designs worked end to end, 19 cheat sheets and a master checklist
₹499. PDF, 111 pages.
Just added
Latest notes
Just added — newest first.
NewPythonPython for Data Engineering — End to End Notes
From installing Python to DSA, Big-O and the coding patterns DE interviews keep reusing, with a 10-week plan to get there. Every topic comes with the approach, code that runs, and the real output.
80 pages477 KB
SQLSQL — End to End Notes
From your first SELECT to the patterns interviewers keep reusing. Every topic comes with the approach to solve it, a query that runs, and the real output.
40 pages329 KB
The library
85 PDF notes · first download free
- NewPython
Python for Data Engineering — End to End Notes
From installing Python to DSA, Big-O and the coding patterns DE interviews keep reusing, with a 10-week plan to get there. Every topic comes with the approach, code that runs, and the real output.
80 pages477 KB
- SQL
SQL — End to End Notes
From your first SELECT to the patterns interviewers keep reusing. Every topic comes with the approach to solve it, a query that runs, and the real output.
40 pages329 KB
Fundamentals PopularData Engineering: From Zero to Production & Interview Ready
Lecture Zero plus fourteen chapters — Linux, SQL, Python, data modeling, storage, cloud, pipelines, Spark, Airflow, Kafka, data quality, a portfolio project and the interview loop. Every figure measured. Free, and it never uses your free note.
244 pages1.4 MB
GitLab & CI/CD PopularGitLab for Data Engineers — Complete Notes
Twenty pages on how your code actually reaches production: Git and merge requests, .gitlab-ci.yml line by line, rules and runners, dbt Slim CI without dbt Cloud, shipping Airflow DAGs and Databricks asset bundles, plus 25 rapid-fire interview questions.
20 pages1.6 MB
PySpark PopularPySpark on Cricket Data — Complete Notes
The full written notes from the 29 August live build: loading raw IPL match data into Databricks, DataFrame analysis with groupBy, window functions, joins and UDFs, tuning with caching and partitioning, and writing the processed outputs to Delta.
20 pages1.8 MB
Two free ways to see where you stand
After the notes
Notes get you through the revision. These get you through the interview.
Read them in order if you like — the free library first, then the deep-dive modules, then the live cohort when you want someone reviewing your work.
Free · no payment
Watch the lessons behind the notes
SQL, Python, Power BI, PySpark and Excel — full video lessons with MCQs and a proctored skill test at the end. The notes are the summary; this is the teaching.
Open the free libraryLearn Pass · ₹499 for 6 months
20 deep-dive modules, 69 sessions
Every note in this vault for 6 months, plus the complete PySpark and Databricks modules recorded end to end with their project notebooks. One payment, nothing renews.
See what's insideAI-Powered Data Engineering Cohort 4 · live cohort
The live data engineering cohort
Live weekend classes (Sat–Sun · 7 AM–9:30 AM IST), real projects, graded assignments, and 6 months of Pro Auto-Pilot included. The full path, taught with you in the room.
See the curriculumYour first note and the free book cost nothing. The rest of the vault comes with the Learn Pass, any paid plan or a cohort seat.