pengfei cheng

I am a professional AI Developer with 3 years of hands-on Python development experience, focusing on LLM application, custom AI Agent construction, RAG knowledge base system development and lightweight AI model training. My core technical stack includes Python, LangChain, LlamaIndex, vector databases (PGVector, Chroma), FastAPI, Docker and mainstream LLM APIs like OpenAI & Gemini. I have delivered multiple production-ready AI solutions, such as business intelligent matching agents, private enterprise document Q&A systems and automated workflow bots for industries including home services and informatization. I provide complete project delivery, covering clean unencrypted source code, database ER diagrams, SQL scripts, API documents and detailed deployment manuals to support clients’ secondary development and privatized deployment. I accept monthly payment cycles (paid between the 15th–18th of the next month) and prioritize long-term stable cooperation. Fluent in both Chinese and English for smooth technical communication. Feel free to view my attached resume and project demos for more details.