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Software Engineer
Hospital Authority, Hong Kong •  January 2011 - January 2021
• Performed system analysis, documentation, testing, implementation and user support for Electronic Health Record Sharing System (eHealth). • Established plan and coordinated total site switchover and switchback drill of new system in production environment. • Conducted system analysis and implementation to rollout new mobile app with COVID-19 Vaccination Pass for public in tight schedule. Established specifications and coordinated production with developers. • Designed enhancements and updates for application services running on intranet and Internet-based platforms. • Participated in architecture, design and implementation of frontend and backend features using Java and Python. • Implemented REST APIs for mobile application, eHealth, and OAuth integration with government by using Java Spring-boot. • Implemented security controls on XML gateway (IBM DataPower) by using XSLT. • Implemented reporting service of processing XML log files by using Python. • Evaluated and resolved issue of integrating API Gateway (IBM API Connect) during early system architecture plotting stage. • Integrated API deployment and management on API Gateway with CI/CD pipeline (Jenkins) • Supported system which used by over 4.3 million users. • Performed regression and system-level testing to verify application quality prior to release • Developed clear specifications for project plans using user requirements • Developed frontend web applications for single sign-on and access management by using Sencha GXT (Java MVC Framework). • Developed backend services by using Java J2EE and EJB. • Developed Web Services with WS Security for health records exchange with healthcare providers by using Java.
Education
The University of Hong Kong (HKU), Hong Kong
Computer Science, MS•  September 2015 - September 2019
City University of Hong Kong, Hong Kong
Computer Science, BS•  September 2006 - July 2010
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