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Nnaemezue Obi-Eyisi

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My Guide to Becoming a “Market-Ready” Data Engineer With a $100 Investment in 3 Months or Less —…

As you may know, the demand for Data Engineers has quadrupled in the last 2 years. There are more jobs than candidates in the job market…

Jan 25, 2021

My Guide to Becoming a “Market-Ready” Data Engineer With a $100 Investment in 3 Months or Less —…

Jan 25, 2021

I fed my entire documentation to ChatGPT, and it still hallucinated.

Read for free here

3d ago

I fed my entire documentation to ChatGPT, and it still hallucinated.

3d ago

How I Learned to Stop Reprocessing 10 Million Records Daily: A Guide to Incremental Data Loads

“Why is our pipeline reprocessing 10 million records every day?”

4d ago

How I Learned to Stop Reprocessing 10 Million Records Daily: A Guide to Incremental Data Loads

4d ago

When PySpark Columns Go Rogue: How unionByName() Saves the Day

“Wait… why did my column values just shift like a bad copy-paste?”

May 9

When PySpark Columns Go Rogue: How unionByName() Saves the Day

May 9

When Commas Break Your CSV: How to Read Complex CSV Files into a Spark DataFrame (Without Losing…

“Why does this file have 10 columns on one row… and 12 on the next?”

May 8

When Commas Break Your CSV: How to Read Complex CSV Files into a Spark DataFrame (Without Losing…

May 8

🧩 “Everything Worked in Dev… Until It Didn’t: My Wake-Up Call with Azure and Databricks”

“The pipeline ran fine on dev, so why is production throwing authorization errors, breaking storage access, and failing silently?”

May 4

🧩 “Everything Worked in Dev… Until It Didn’t: My Wake-Up Call with Azure and Databricks”

May 4

I Almost Got Fired Because of Pandas on Databricks — Here’s What You Should Learn From My Mistake

Just because your code works doesn’t mean it scales.

May 3

I Almost Got Fired Because of Pandas on Databricks — Here’s What You Should Learn From My Mistake

May 3

How I Answered: “Design a Spark Job That Processes Terabytes of Data Every 10 Minutes on…

A behind-the-scenes look at tackling a real-world system design interview question — with Databricks as the stage.

May 1

How I Answered: “Design a Spark Job That Processes Terabytes of Data Every 10 Minutes on…

May 1

Data Engineering Interviews Are Broken — Here’s How to Fix Them

What if your hiring process is filtering out the exact engineers who will thrive?

Apr 29

Data Engineering Interviews Are Broken — Here’s How to Fix Them

Apr 29

From Snowflake to Databricks: A Data Engineer’s Guide to Thriving in the Lakehouse Era

Transitioning from Snowflake to Databricks isn’t just about changing tools — it’s about shifting your entire engineering mindset.

Apr 19

From Snowflake to Databricks: A Data Engineer’s Guide to Thriving in the Lakehouse Era

Apr 19

Nnaemezue Obi-Eyisi

Nnaemezue Obi-Eyisi

I am passionate about empowering, educating, and encouraging individuals pursuing a career in data engineering. Currently a Senior Data Engineer at Capgemini

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