Johnny Fang

As a versatile full-stack developer, I excel in server environment setup,

performance optimization, and cross-platform application development. I

have hands-on experience with AI LLM and backend frameworks including

Contextual short-term memory, user profile long-term memory, and private knowledge

vector database , Langchain, MemGPT, and fine-tuning techniques for LLM. C#.NET,

React, Node.js, Express.js，Django, and Spring Boot,php, mysql,PostgreSQL

I also have solid experience in database design and optimization

(MySQL, MongoDB, Redis) and mobile app development using Flutter, Android.

My ability to handle the full software lifecycle—from infrastructure

setup to production deployment—enables me to build robust and scalable

systems independently.