Hi, my name is
Alex Leung
Software Engineer and Occasional Writer.
I build software, write notes, and make small tools for understanding systems and AI.
What you'll find here
I keep essays, notes, and small project writeups here: software engineering, system design, AI, product work, and learning.
I tend to write from the practical edge of those topics: what I tried, what held up, where the tools helped, and where the rough edges stayed visible.
Recent Photos
Lake Louise 
Twin Peaks 
Chengdu
Latest Writing
Farming Expensive Coding Agent Sessions
June 14, 2026
My coding-agent sessions are more expensive now. The useful spend is the part that turns mistakes into better tests, graders, prompts, and checks.
Camping Indoors in San Francisco
April 27, 2026
My first week in San Francisco: paperwork, an unfurnished apartment, two cats, Bay Trail runs, and waiting for furniture.
Coding Agents for Inspectable Browser Tools
April 10, 2026
Building frontend-only tools for load flow, Mandelbrot zooming, optimizer behavior, and event-loop ordering gave me concrete ways to inspect older technical models.