11/12/2026 updated
JH
100 % available
Developer for maintaining and integrating business systems (PHP, ASP.NET, MySQL, SQL Server)
Taipei, Taiwan
Only remote
About me
I maintain and connect business systems (PHP, ASP.NET, MySQL, SQL Server) and build web systems and mobile apps. I work mainly in writing; scope and revision rounds are agreed before work starts. Prices are quoted per project. I use AI tools (Claude, GPT) in my development work.
ASP.NETPHPApplication Programming Interfaces (APIs)ASP.NET MVC FrameworkBusiness SystemsMySQLSQL Databases
I maintain and connect business systems, and I build web systems and mobile apps.
Back end: C#, ASP.NET Core, ASP.NET MVC, ASP.NET WebForms, PHP, Node.js, Express, REST APIs, Windows background programs (scheduled jobs, multi-threaded FTP file exchange).
Databases: SQL Server, MySQL, MariaDB, Oracle, stored procedures, Redis, Kafka.
Web front end: Vue 3, Vue 2, React, Angular, TypeScript, JavaScript, jQuery, Bootstrap.
Security: JWT, two-factor authentication, Keycloak, multi-level accounts and permissions.
Deployment and operations: Linux (CentOS), Nginx, Docker, ELK, Azure, GitHub Actions, Git, GitLab, Azure DevOps, SVN.
Mobile: React Native (Expo), TypeScript, SQLite for offline data, App Store release.
Early career: C programs for machine control.
Typical work: taking over an existing system to fix or extend it; connecting a new application to an existing system through APIs or file exchange; reports and admin screens; sign-in and permission systems; deployment and server operations.
I use AI tools (Claude, GPT, GitHub Copilot, Cursor) in my development work.
Experience
Professional experience10+ years
Freelancer since2016
Languages
ChineseNative speakerEnglishGood