yonghe j.

17 Years PHP/MySQL Expert | AI-Assisted Full-Stack Developer

I’m a PHP/MySQL expert with 17 years of hands-on experience building, maintaining, upgrading, and troubleshooting web systems. My core work includes PHP bug fixing, legacy PHP upgrades, server migration, MySQL optimization, security hardening, performance tuning, and resolving issues in existing codebases. I’m comfortable stepping into unfamiliar projects, reading existing code quickly, identifying root causes, and applying practical fixes without unnecessary overengineering. My technical background includes PHP, MySQL, Linux server environments, JavaScript, HTML, CSS, backend development, custom website development, and technical project leadership. I also use AI-assisted development tools such as Cursor to speed up full-stack development, improve debugging efficiency, and build modern web applications faster. Recently, I developed and launched an AI creative platform using a PHP backend and Next.js frontend, covering AI image generation, AI video tools, image processing workflows, and manual QA testing before release. In addition, I have experience with automation and data conversion tasks, including structured file processing such as PSD-to-JSON workflows. If you need someone who can understand existing systems, solve technical problems efficiently, modernize legacy projects, or build stable AI-assisted web applications, I’d be glad to help.