Jul 7
When Real Technology Meets Bad Investment
When Real Technology Meets Bad Investment: AI, Railways, Chinese EVs, and the Next Infrastructure Cycle AI is usually discussed in two extreme ways. ...
11 min read
Writing
Notes on systems, LLMs, and the industry building them.
I'm Wenhao, a software engineer. I write up system design problems I've worked through, what I'm learning about LLMs, notes from shipping side projects like ResumeMatch, and the occasional take on layoffs and where the industry is heading.
22 postsSince 2025
Jun 10
When Metrics Reward AI Usage Instead of Real Work
Amazon recently shut down an internal AI usage leaderboard called KiroRank after employees reportedly started optimizing for the leaderboard instead ...
8 min read
Jun 1
When Prompt Engineering Hits a Ceiling
For the last two weeks I've been stuck on the same bug in ResumeMatch. The resume rewrite pass was producing edits that looked plausible at first gla...
7 min read
Mar 21
How I Fixed False Negative Keyword Matching in My LLM-Powered Resume Analyzer
Happy Friday! Weekend's almost here, but before I sign off, I wanted to write up a fix I shipped this week for ResumeMatch. A user in the accounting ...
10 min read