About

👋 Hi, I'm Heng Liu, a software engineer at Amazon Web Services, originally from China.

This blog is mostly for myself: lessons on software engineering, AI agents and correctness that I want to remember, and the experiments I run in my own time.

I came to the US for my master's degree in computer science at Rutgers University. I then spent three and a half years at Meta as a software engineer, working across ads, video infrastructure and privacy. After that I joined Flexport, where I built the internal commerce system for quotes and charges. I joined Amazon in 2024, first on AWS AppSync, and now I work on Kiro, an agentic AI development environment.

Opinions here are my own, not my employer's.

This site uses no cookies and no cross-site tracking. If you find an error in a post, open an issue on the experiment repository it links to, or reach me on GitHub. Corrections are part of the point.