Welcome to my portfolio.

Yong Guan Chen

Java Back-end Engineer / AI Full-Stack Application Developer

Built on Java back-end development with hands-on AI full-stack application experience. Worked on knowledge base systems, e-commerce tools and automation workflows from development to deployment.

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GitHubEmail
03
Selected Work
19
Skills
02
Internship Experience
About

Java Back-end Engineer / AI Full-Stack Application Developer

Notes on engineering, AI applications and the things I learn while building.

Hi, I'm Chen Yong Guan, a developer focused on Java back-end engineering and AI application delivery. I am comfortable with Spring Boot, MyBatis-Plus, MySQL and related back-end technologies, and I can also build AI-powered tools and web applications with Python and modern web stacks.

During my internships, I worked on an AI knowledge base for an education platform, a multi-tenant sticker e-commerce system, production automation tools, OCR quality inspection and deployment workflows. These experiences helped me build practical understanding across business systems, AI integration, data storage, SEO and shipping real products.

I am especially interested in Prompt design, Agent workflows and AI application architecture, and I want to keep growing into an engineer who can own business modules independently and push ideas into production.

Selected Work

Projects and case studies

Built on Java back-end development with hands-on AI full-stack application experience. Worked on knowledge base systems, e-commerce tools and automation workflows from development to deployment.

JA
01
Mar. 2025 - Sep. 2025

JBang AI Knowledge Base System

Built knowledge base management and document processing workflows for an AI education platform serving teachers.

Role: Java Back-end + AI Application Development Intern

Java
Spring Boot
MyBatis-Plus
MySQL
Milvus
SSE
Website
MT
02
Sep. 2025 - Mar. 2026

Multi-tenant Sticker Commerce & AI Ops Toolkit

Worked on a multi-tenant sticker commerce system together with AI image generation, OCR inspection, payments, SEO and deployment workflows.

Role: AI Full-Stack Development Intern

Shopify API
Python
PaddleOCR
PayPal
Stripe
Cloudflare Workers
R2
Website
SP
03
Sep. 2025 - Mar. 2026

Sticker Production Automation Tool

Led an internal tool that turns manual sticker production file preparation into a one-click workflow for printing and contour cutting.

Role: AI Full-Stack Development Intern

Python
PyQt6
Automation
File Processing
Skills

Skills

Java
Spring Boot
MyBatis-Plus
MySQL
Milvus
Python
PyQt6
JavaScript
TypeScript
Web Applications
Prompt Engineering
AI Agent Workflows
PaddleOCR
Shopify API
Cloudflare Workers
R2
SEO
Stripe
PayPal
Internship Experience

Internship Experience

S

Shenzhen Meiyunjing Trade Co., Ltd.

AI Full-Stack Development Intern
Shenzhen · 2025.09 - 2026.03
Worked on production automation, AI image generation, OCR text inspection, a multi-tenant Shopify-based commerce system, payments, SEO and Cloudflare deployment for sticker customization and operations.
G

Guangzhou Weijiang Internet Technology Co., Ltd.

Java Back-end + AI Application Development Intern
Guangzhou · 2025.03 - 2025.09
Built core knowledge base modules for JBang AI, including category management, document parsing, asynchronous ingestion, SSE progress delivery and MySQL + Milvus based storage design for enterprise data isolation.
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