PySpark Under the Hood: RandomSplit() and Sample() Inconsistencies Examined

When I first began using…

How Udemy does Build Engineering

An overview of Build Engineering at Udemy and the way we provide continuous integration at scale.

Unit Testing Best Practices

Some best practices that we found useful for clean and reliable unit…

Demystifying Apache Spark 3.0

Embrace new Apache Spark features such as Adaptive Query Execution…

Automating Elasticsearch Reindex Process

We automated reindex operation by building a cross-cluster…

How to Build a Career in Data Science Coming from a Non-Tech Background

4 challenges and how to…

Supporting Multiple Time Zones on Hive with Single Data Source

Enforcing code ownership at Udemy

Code ownership is a tricky thing to get right. Things become even trickier when you throw a…

Tips For Online Job Interviews

While working remotely, taking online meetings, and online interviews have been getting more popular day…