Jun C.

@jun_cui

AI Agent and RAG Developer

China

Chinese, English

About me

Hi, I'm Jun, an AI application developer working with Java and Python. I build AI agents, RAG assistants, and AI-enabled business tools. I help clients automate workflows, build private knowledge bases, extract data from PDFs and Excel, integrate APIs, and add AI to existing software. I also review and improve Simplified Chinese websites, apps, and content. My stack includes Java, Python, LangChain/LangGraph, vector databases, FastAPI, REST APIs, PostgreSQL, Docker, and OpenAI/Claude APIs. I start with a small, clearly scoped milestone and scale after we agree on the next step.... Read more

Skills