Hi, my name is
Alex Leung
Software engineer and writer.
I build software and write about systems, AI, and learning in public.
What you'll find here
You'll find essays, notes, and personal reflections on software engineering, system design, AI, product work, and learning.
I care about the practical edge of those topics: how products get built, how systems hold up, and how new AI capabilities fit into real software.
Latest Writing
Relearning Through Small Interactive Tools
April 10, 2026
Using a coding agent to build small browser tools turned out to be a good way to revisit concepts I had not touched in a while.
Dropout as Implicit Bagging
March 7, 2026
Chapter 7 clarified that dropout works so well because it approximates bagging over many thinned networks with shared parameters.
iPad Air M3 11-Inch: First Impressions
March 5, 2026
For study-heavy workflows, a lightweight iPad Air setup with a keyboard, stand, and Pencil Pro can be a practical laptop replacement.