• HKBH eVM (ITSS Revamp): Built hospital e Vendor Management on Kubernetes (Angular/PrimeNG + NestJS/Drizzle + PostgreSQL)—Oracle ERP PR staging via Tyk (fetch/ack), Jira ITSM Automation inbound/outbound, SMTP handler notifications, Cloudflare Tunnel, Dev E2E with Fake ERP/Jira, plus Program Manual and integration guides. • OS Patch Automation (Admin SPA): Built Angular 19 operator console for enterprise OS patch lifecycle—discovery, CMDB/drift, sandbox, UAT/PROD scheduling, SIC approvals, deployment jobs, SLA dashboards, and audit evidence (os-patch-admin.pages.dev). • PMSA AI Assistant: Delivered Cloudflare GenAI ops PWA (React + Hono) for Property Management Services Authority—C&E draft/resolve (human-in-the-loop), RAG knowledge chat, supporting agents, and OWASP-aligned auth on Workers/D1/R2/Vectorize. • ChatMinutes: Delivered AI meeting-minutes PWA (React/Vite on Cloudflare Pages) with AI-assisted drafting for Expert AI Enabling (ai-chat-minutes-demo.pages.dev). • GenAI portals (HSU / SFU): Built Angular AI Admin Portals for Hang Seng University and Saint Francis University—knowledge bases, model settings, Moodle workflows, RBAC/quotas, and Azure AD SSO. • Backend (NestJS): Designed NestJS APIs for GenAI RAG and eVM services—SSO/auth, Moodle sync, knowledge ingestion, chat, and reporting. • LMS / Moodle: Delivered Moodle plugins (ChatEnquiry, CourseMonitor) for course-grounded AI chat with operational controls. • Documentation & delivery: Authored program/user manuals and runbooks; supported Jira tracking, UAT, and stakeholder walkthroughs. • DevOps & quality: Owned UAT-to-production pipelines (Docker/Nginx, Kubernetes, Cloudflare); Led end-to-end SDLC delivery through UAT and production release, with Nginx/HTTPS edge hardening, SonarQube/SonarCloud static code analysis (SAST), and OWASP ZAP dynamic security testing (DAST). • Security: Applied OWASP session controls and LLM prompt/IO guardrails; provided L2/L3 support and post-go-live stabilization.

• Engagement: Contracted via Manpower Services (Hong Kong) Limited (20 Nov 2024 – 31 Mar 2025) and IT People Limited (1 Apr 2025 – 31 Jul 2025) as Analyst Programmer / Consultant at Hospital Authority. • Backend (Java): Developed HR User Management System (UMS) services with Spring Boot and Java 8, using Microsoft SQL Server (MSSQL) and stored procedures for secure CRUD, dynamic filtering, and data access layers. • Frontend & Integration: Delivered UI workflows and integration protocols spanning admin screens and backend APIs for HR operations. • Delivery & SDLC: Supported digital healthcare rollouts (Paperless ECG, E-Vital Smart Panel, E-Admission, IPMOE, ERS) through implementation, UAT coordination, and production handover. • Integration & Ops: Planned and executed system integrations to improve clinical/operations workflows, with documentation for clinical and support teams. • Security & Quality: Applied secure access patterns and validation controls for sensitive HR/clinical data during development and release readiness.

• Frontend: Delivered React/TypeScript interfaces for construction SaaS products across workflow, document, and onsite tracking experiences. • Backend: Contributed to microservices-backed features for SCI Workflow, Document Tracker, Fotolio, Punchlist defect recognition, and DMS document management. • DevOps & CI/CD: Supported release preparation, environment deployment coordination, and operational handover with automated Jest quality checks. • Full SDLC: Participated end-to-end from feature delivery and testing through release readiness and post-release stabilization for production SaaS workloads.

• Employed via Keyteo Consulting HK Limited and seconded to Sun Life as Web Developer (15 Oct 2018 – 7 Feb 2021). • Re-structured web portal UI architecture in a portal transformation initiative. • Managed scrum strategies to bootstrap product deliverables inside agile development structures. • Built and successfully launched the My Sun Life HK Group Health applications suite:

• Application Developer in the Information Technology Department (18 Dec 2017 – 14 Oct 2018). • Created a PWA web app for users to tailor-made and design jewellery goods. • Delivered responsive UI flows for product customization and checkout experiences.

• Worked in a squad team of 6 in an agile environment with scrum project management methodology. • Created progressive web apps using Vue.js with state management and Bootstrap-based UI components.

• Maintained in-house websites, e-learning platforms, and mobile apps in the HR division. • Supported employee-facing systems including facility booking and document download workflows.

• Participated as the initial frontend web developer in this social site startup. • Built website interfaces and hybrid web apps with designers; created an instant messaging system for end users.

• Provided digital solutions such as websites for government projects.

• Built interface prototypes for a travel agency website.