subscribeOn Feeling Weak · 关于无力感
Twenty years of learning, four years of acceleration, and what remains ours. Written late at night, in both my languages.
Hi. I'm Du — a machine-learning engineer in the Bay Area. By day I'm a Staff ML Engineer at Zscaler, where I build large-language-model systems for cloud security; nights and weekends I write the occasional very long essay about how the sausage is made. This site is hand-coded, mostly validates, and has an RSS feed, because it is 2005 somewhere.
recent essays
Agent Teams vs Sub-Agents: Multi-Agent Architectures for LLMs
AI agents that talk to each other, peer-to-peer. How that compares to hub-and-spoke, and when each one earns its complexity.
Skills vs MCP: Tool Architecture for AI Agents
How should a machine hold its tools? Enterprise cases, security considerations, and some opinions.
Context Engineering: Building Intelligent Memory Systems
Giving language models a memory, so they stop forgetting you between conversations.
Scaling SEO & GEO Content with LLMs
Teaching machines to write things other machines want to read. The circle of life, automated.
briefly
- 2025–now staff ml engineer, zscaler
- 2025 lead founding engineer, yc-backed startup ($300k → $5m arr)
- 2024–25 senior ml engineer, linqto
- 2023–24 data scientist, simplr.ai
- 2022–23 m.eng eecs, uc berkeley
- 2018–22 b.s. data science, uc san diego (summa cum laude)
