7 articles • 2 series • 1 standalone

Engineering Deep Dives

I take systems apart to see how they work, then write down what I found.

Series

3 articles

Java Collections & Data Structures: From Scratch

Read the series →

3 articles

How Docker Works: Container Internals Under the Hood

Read the series →

Standalone

2026-10-06

Mastering Cron Expressions: From Syntax to Production-Grade Scheduling

How cron expressions work across Unix, Quartz and Spring: special characters, a cheat sheet, time zone and daylight saving edge cases, and distributed locking.