Web-based POS system:

• Primary developer responsible for designing and implementing the POS system.
• Designed and implemented remote control functionality for POS system peripheral devices.
• Designed and implemented third-party system integrations.
• Study and implemented AI assistant using RAG.

System Optimization:

• System Under Test: Analyze and implement POS System test and improve test coverage.
• Optimized a database with tens of millions of records, improving query efficiency by 70%+.

Middleware service between E-Commerce server and client:

• Design and implement middleware services using Node.js, Express, 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:

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

Internal production line management system:

• Design and implement the front-end production line management system using Vue.js.
• Assist partners in building back-end servers using Python (Flask-RESTful).

Jukebox back-end website:

• Design and implement back-end website using React.js, GraphQL.

New generation CNC:

• Design and implement web HMI using React.js.
• Maintain and implement motion controller and algorithm (Rust language).
• Integration web HMI and motion controller.

IoT system integration:

• Design and implement data collection of peripheral sensors using Node.js.
• Design and implement CNC monitoring with MTConnect protocol.
• Using Modbus protocol to fetch data from sensors on ARM-based.
• Maintain CNC: Maintain web HMI (Yahoo Mojito framework) and motion controller.