Deep dives on the queries, pipelines, and architectures that show up in real interviews and real production systems. Written by practitioners, edited for engineers who already know the basics.
Fivetran's survey of 500 leaders and dbt Labs' survey of 363 practitioners show AI speeding up coding while pipeline testing lags. What it means.
Airflow 3.3 adds a task and asset state store and a Java and Go Task SDK. What changed since July 2026 and what it means for data engineers.
IBM closed its $11.59B Confluent deal as Kafka 4.3 shipped production ready share groups. What native queues mean for data engineers.
Spark 4.0 and 4.1: ANSI mode now default, Java 17 required, VARIANT type added, pyspark-client at 1.5 MB. What the changes mean for data engineers.
Databricks now runs Delta Lake and Iceberg on shared Parquet files and shipped Lakebase GA at Data+AI Summit 2026. What it means for Data Engineers.
Snowflake Datastream lets existing Kafka producers connect with a config change and land data as Iceberg tables in seconds. What Data Engineers should evaluate now.
DataDriven launches the Weekly: 1 community data engineering challenge a week, scored blind on hidden data. The first is stream parsing, open 10 days.
Apache Iceberg v3 is GA on Snowflake, Databricks, and AWS. Deletion vectors and row lineage are the 2 changes data engineers should act on first.
Fivetran and dbt Labs merged June 1, 2026. dbt Core v2 alpha ships a Rust engine 30x faster on large projects and breaks some adapter compatibility.
Amazon added a 20-minute system design sketch to its 2026 OA while cutting 16,000+ roles. What changed, why the bar rose, and how to prep now.
A 10-year FAANG vet passed 6 DE interview rounds, then got rejected for the right answer. Here is what 2026 interview loops are actually testing.
Companies dropped DSA under community pressure and created chaos. In 2026, DE interviews have no standard format and no clear target to prep for.
10-20 hour pipelines. Templated rejections. Zero feedback. DE candidates are building real production work for free in 2026 and getting nothing back.
Junior DE postings dropped 67%. Only 3% of 260,000 openings are entry-level. Here's what caused the collapse and how to break in anyway.
48% of data engineering candidates use AI to cheat, and 61% advance undetected. Here is what it means for honest DEs navigating 2026 interviews.
Salary sources for data engineers disagree by more than $120,000 in 2026. Here is why the numbers conflict and what senior DEs actually earn at top firms.
7 in 10 companies dropped DSA from DE interviews but replaced it with nothing. Here's how to prep when every company tests something different in 2026.
FAANG replaced coding screens with debugging rounds in 2026. The take-home is dying. Here's the new DE interview format and how to actually prepare for it.
Junior DE postings collapsed 67% as AI killed entry-level work. Here's what the 2026 market actually looks like and how to break in anyway.
Fabric's 19,368-interview study: 48% of DE candidates cheat with AI. Honest engineers are losing offers. What this means for your 2026 job search.
Nearly 30% of 'Senior DE' postings are disguised mid-level roles. Decode the actual level before your loop fails at 'culture fit'.
Median $155K, Databricks at $280K, Glassdoor wrong in both directions. What 18,786 job postings actually reveal about data engineer pay in 2026.
DSA rounds vanished from data engineering interviews but no standard replaced them. Here is what 2026 loops actually test and how to prep for the chaos.
DE take-homes now run 10-20 unpaid hours across 7 rounds and 90 days. A 10-year FAANG vet still got rejected. Here's what the hidden rubric actually scores.
Junior DE postings collapsed 67% in 2026 while overall hiring grew 23%. Here's what's killing entry-level roles and the paths that actually work now.
64% of companies ban AI in DE interviews. 80% of candidates use it anyway. What that structural contradiction means for your prep strategy in 2026.
47% of DE job postings in 2026 are ghost jobs. The data behind the number, why companies post roles they won't fill, and the red flags to check before applying.
Scrapers return nested JSON, broken dates, and currency strings. How data engineers handle them, and how to practice the same problems in Python.
Job postings demand 15 technologies for $140K. Staff engineers can't pass them on paper. Here's what 20 real applications reveal companies actually want.
Empirical data shows LeetCode scores predict nothing for DE job performance. Yet companies keep testing it. Here's what's actually changing in 2026 DE interviews.
Aggregators report a $60K+ spread for the same DE role. Remote beats SF by 4%. Senior listings at $110K. Here's what the numbers actually mean in 2026.
Entry-level DE postings fell 67%. The classic role is fragmenting into 6 specialties, and each one interviews differently. Here's what to target in 2026.
AI cheating on DE take-homes doubled to 80% in 6 months. Companies know it's broken. Here's what's replacing it in 2026 and how to prep now.
66% of CEOs post data engineer jobs with no intent to hire. Learn to spot ghost listings, find where hiring is real, and stop wasting your search on phantom roles.
Companies dropped DSA from data engineering interviews but replaced it with chaos. Here is what the 2026 loop actually looks like now, and how to prep.
Glassdoor and Indeed disagree by $120K on Senior DE pay. We analyzed 244 real job postings. The real 2026 median will surprise you.
RAG system design, vector DBs, and agentic pipelines are now standard in DE interview loops. Are you still prepping for last year's SQL-and-Spark screen?
Confluent laid off 800 engineers in March 2026. Databricks is actively hiring from that list. Here's what their interview actually tests and how to land a role.
Take-home DE interviews now run 10-20 hours. 64% of companies ban AI. 80% of candidates use it anyway. Here's what's actually happening , and how to navigate it.
Companies are dropping LeetCode from data engineering loops but no one agrees what replaced it. Here's what you're actually walking into in 2026.
SQL jumped from 61% to 79% of DE job postings in one year. Engineers prepping Spark are failing Amazon and Uber loops on window functions. Here is the real 2026 stack.
Glassdoor says DEs earn $133K in 2026. Live job postings show $160-200K. Here's the methodology flaw misleading candidates in salary negotiations right now.
The DE interview loop expanded to 5-7 rounds in 2026 and tests completely different skills. Here's what companies actually ask now, and how to prep.
Staff engineers are failing new-grad screens. Take-homes hit 20 hours. The top rejection reason is never disclosed. Here is what is actually happening in DE interviews right now.
The DE system design round now tests LLM eval harnesses, embedding pipelines, and feature stores. Here's what senior engineers are missing, and how to fix it fast.
Classic DE interview prep is failing candidates in 2026. Here's exactly what AI Data Engineer technical screens test , RAG, vectors, embeddings, and eval harnesses.
Which DE certs boost your ATS score in 2026 , and which flag you as outdated? Databricks, AWS, dbt, and AI certs ranked by real 2026 hiring signal.
After 90 days, 6,538 data engineers, and 412,887 SQL queries graded, here is what the DataDriven 75 reveals about data engineer interview prep.
Your ETL GitHub projects are failing you in 2026 screens. Here's exactly what AI-native DE portfolios need: RAG pipelines, LLM eval harnesses, and vector DB projects.