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David Chen

Principal Data Scientist

DataSphere Labs

4.7

Rating

Years exp.

Qualification

PhD Machine Learning

About

Data scientist with a PhD in machine learning. I teach Python, SQL and ML with a focus on practical intuition.

Courses (3)

Reviews (9)

8/9/2026

David makes pandas feel approachable. The visualization module is my favorite.

8/9/2026

I went from no Python to analyzing real datasets. Fantastic course.

8/9/2026

Great fundamentals, clear code alongs. Would love a section on time series.

8/9/2026

Window functions finally clicked for me. The query plan section is a superpower.

8/9/2026

The exercises are the best part — you really learn by doing.

8/9/2026

Solid SQL foundation. Could use a few more advanced performance tips.

8/9/2026

Rigorous yet approachable. I shipped my first model to production after this.

8/9/2026

The model evaluation module is worth the price alone. Extremely thorough.

8/9/2026

Challenging but rewarding. Bring your statistics basics.

David Chen

About

Courses (3)

Python for Data Science

SQL & PostgreSQL Mastery

Machine Learning with Python

Reviews (9)