Cx330xu 
Tech Journey
Started LLM Engineering
Systematically studied LLM APIs, prompt engineering, and foundational RAG architecture
Launched CSDN Tech Blog
Started publishing original technical articles on CSDN covering LLM, Python engineering — 19+ posts and counting
Released Prompt System
Designed and built a prompt management system with FastAPI + Next.js, with Docker support and team collaboration
Published Prompt Engineering Deep-Dive
Authored a 10k-word prompt engineering tutorial covering CoT, RAG, and Agent techniques
Personal Tech Hub Launched
Built a bilingual personal tech brand site with Astro, integrating project showcases, blog, notes, and GitHub activity
Who I am
I’m Cx330xu, an AI Agent Engineer focused on LLM applications, RAG, and production-grade Agent workflows. I validate ideas with runnable code first, then document architecture decisions and lessons learned in long-form posts.
My stack centers on Python / FastAPI and TypeScript / Next.js / Astro. Recent work includes prompt management systems, document extraction pipelines, personal knowledge sites, and CI/CD for static deployments.
Featured projects
Prompt System
A FastAPI + Next.js prompt management system with local Linux and Docker deployment. It centralizes prompt versioning and reuse as infrastructure for Agent / RAG projects. Stack: FastAPI, Next.js, Docker, Prompt Engineering.
PDF Vector Extractor
PDF vector and text extraction tooling for downstream RAG indexing. Stack: JavaScript, Web, document parsing.
See the full project list.
Writing & output
Personal Tech Hub is my technical home on the web: open-source showcases, in-depth articles, short notes, and Giscus discussions.
- On-site blog: topics include prompt engineering and Docker quickstart
- CSDN mirror: Xu_youyaxianshen with 19+ original posts; older articles in the CSDN archive — new posts are canonical here
Current focus
I’m iterating on Agent engineering practice and this site. See Now for what I’m working on.
Privacy
This site does not publish school, degree, phone, or WeChat details—only technical content and contact info. For hiring or collaboration, email me and I can share additional project context and repository links.