• Led the project to build and deploy the company's English official site using Next.js and Vercel, ensuring long-term maintenance and functionality.• Created and managed the official YouTube community, collaborating with the marketing team to contribute content and enhance the company's online presence.

• Maintained the Guardian Smart Flagger Android application as part of a three-member team, focusing on bug investigations and feature enhancements.• Led the development of the Android version of "Onyx," a primary company product (ERP for payroll, quoting, dispatching, and invoicing traffic safety jobs) using React Native and Android Native. Enhanced the product with unique offline working capabilities and online auto-sync functions, improving data consistency in extreme and high-traffic control conditions.• Collaborated closely with dispatcher coordinators from Titan Traffic Control, the primary user of the Onyx Android version, to gather feedback and improve overall product quality based on customer needs.• Contributed to the main Onyx platform (Webapp in Vue.js) as part of the full-stack development team (Vue.js & Python Flask), focusing on regular feature development and bug fixing. Exclusively assigned the PWA implementation task, conducted research, estimated task difficulty, and successfully executed the implementation.