POS system:

• Served as the primary developer responsible for designing and implementing the POS system (Web/Mobile).
• Designed and implemented remote control functionality for POS peripheral devices.
• Designed and implemented third-party system integrations.
• System Under Test: Analyze and implement the POS System test and improve test coverage.
• Researched and implemented an AI assistant using RAG.

Shopee Smart Pickup Station:

• Designed and implemented 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:

• Designed and implemented middleware services using Node.js, Express, and MongoDB.
• Build microservices with AWS (Lambda, SES, SQS, S3, API Gateway, etc.).
• Design RESTful API and build a document of the implementation plan.

Outo outdoor activity platform:

• Designed and implemented the back-end server using TypeScript, Express, MySQL.
• Build servers with AWS (EC2 , VPC, RDS).

Internal production line management system:

• Designed and implemented the front-end production line management system using Vue.js.
• Responsible for timeline analysis, technical evaluations, introducing new technologies, and mentoring junior engineers.

Jukebox Administration Website:

• Designed and implemented back-end website using React.js, GraphQL.

CNC(Computer Numerical Control)::

• Designed and implemented a web HMI using React.js.
• Maintained and implemented motion controller and algorithm (Rust language).
• Integration of web HMI and motion controller.
• Maintained the web HMI (Yahoo Mojito framework) and motion controller of a CNC system over 5 years old.

IoT system integration:

• Designed and implemented data collection of peripheral sensors using Node.js.
• Designed and implemented CNC monitoring with MTConnect protocol.
• Using Modbus protocol to fetch data from sensors on ARM-based.