• Developed a payment, operation and administration system of restaurants, design API with authorizations to provide services in restaurant management. (Back-End)• Developed the web system, windows client, iOS, and Android app of the administration software system. Made integration code with great compatibility for hardwares to connect with windows client and mobile Apps. (Client Applications, Front-End)• Designed a new system facing customers for online ordering which is a web application for customers to make orders and payment by themselves on their phone. (Online Ordering System, Front-End)• Developed and maintained the system facing customers for ordering by themselves. Including a kiosk system for self-ordering in fast food restaurants, a web application for customers to make orders by themselves on their own table. All these systems are integrated with the restaurant system based on a multi-server communication structure. (Self-Ordering System, Front-End)• Designed a short message service based on OpenWRT which integrated with the restaurant system when a customer notification service needed. (SMS Service)• Developed the server management system and administrated the system for deploying new version and falling back. Doing testing and source control for the whole code base, servers of the system are managed on AWS EC2. (Maintenance)• Obtained issues and requests from clients to design development calendar to fulfill some important request on new features. (Demand Analysis)

• Designed API with authorizations to provide services in restaurant management.• Collaborated with system engineers, data scientists, frontend developers and software developers to implement solutions that are aligned with and extend shared platforms and solutions.• Designed, developed, troubleshot, debugged, tested, ensured browser compatibility, and implemented front-end application and back-end server.• Provided thought leadership to the team around new approaches, workflows and technologies.