• Collaborated wioth a freelance studio, delivering contract projects for clients.
• Architected and delivered full-lifecycle projects for clients, including a golf course operations portal, restaurant POS system, and hotel booking system.

POS system:

• Built a POS system with remote peripheral device management.
• Architected a third-party integration platform with concurrency control and retry infrastructure.
• Built an AI-powered customer service assistant, reducing team training time by 30%.
• Established a testing framework to improve development efficiency and POS system stability.

Shopee Smart Pickup Station:

• Delivered the backend for the Smart Pickup Station system.
• Optimized a database with tens of millions of records, improving query efficiency by 70%+.

Middleware service between E-Commerce server and client:

• Developed middleware services with Node.js, Express, and MongoDB.
• Deployed microservices on AWS (Lambda, SES, SQS, S3, API Gateway).
• Authored RESTful API specifications and implementation documentation.

Outo outdoor activity platform:

• Built the Outo web backend with TypeScript, Express, and MySQL.
• Provisioned server infrastructure on AWS (EC2, VPC, RDS).

Internal production line management system:

• Shipped the production line management system with Node.js and Vue.js.
• Drove timeline analysis and technical evaluations; introduced new technologies and mentored junior engineers.

• Jukebox Administration Website: Built the frontend with React.js and GraphQL.
• Developed a CNC web HMI with React.js.
• Maintained motion controller algorithms in Rust.
• Engineered an IoT data collection system for peripheral sensors with Node.js, Modbus, and ARM-based hardware.