About Me

Platform Engineer with expertise in building enterprise-grade payment systems, cloud infrastructure, and scalable applications. Passionate about security, performance, and developer experience.

What I Do

Build enterprise payment systems with Type Approval and APIP compliance

Design secure microservices with JWT, HMAC-SHA256, and AES-256-GCM encryption

Deploy and maintain production Kubernetes clusters with 99.9% uptime

Optimize SQL queries achieving up to 95% performance improvements

Architect cloud-native solutions on AWS and Tencent Cloud

Develop modern web applications with Next.js, React, and TypeScript

Education

University Tunku Abdul Rahman (UTAR)

Bachelor of Science (Honours) Software Engineering

Graduated: 2023

Work Experience

September 2025 - November 20252 months

Full-Stack Developer & Platform Engineer

Appnovation

Kuala Lumpur, Malaysia

Full-stack development across multiple enterprise clients spanning e-commerce ticketing, payment systems, healthcare booking, and AI-powered tourism platforms. Delivered 4 major production projects using Java/Spring Boot backend services and React/Next.js modern frontend applications with AWS cloud infrastructure.

Key Responsibilities

▪Built full-stack HKTB AI Trip Planner (~15,000 lines) with Next.js 15, React 19, TypeScript, AWS Amplify Gen 2, featuring 5-step questionnaire, drag-and-drop itinerary management with @dnd-kit, admin portal with DynamoDB batch imports (25 items/batch), and 1,500+ translation keys across 3 languages
▪Developed full-stack ECHealth healthcare booking mini-program (5,277 lines in 5 days, 39 commits) with React 19 + TypeScript frontend and Spring Boot 3.4 backend, implementing OAuth2 + JWT with automatic token refresh, AWS SES email notifications, automatic database schema migrations, and zero-setup development environment
▪Architected Type Approval (TA) compliant payment status polling system for Ocean Park with ScheduledExecutorService and ConcurrentHashMap, polling every 5-10 seconds for up to 30 minutes, integrating Octopus payment gateway (XML-based protocol) with TAS for real-time admission code generation
▪Built standalone Octopus payment gateway microservice (3,680+ lines) with APIP-compliant multi-tenant architecture, HMAC-SHA256 request signing, replay attack prevention, merchant management with automatic key rotation, webhook delivery with retry logic, reducing integration time by 70%

Achievements

Delivered 4 major production projects totaling ~24,000 lines of code: HKTB AI Trip Planner, ECHealth Booking System, Ocean Park Ticketing, and Octopus Payment Gateway
Built comprehensive full-stack applications spanning React 19, Next.js 15, TypeScript, Java 17, Spring Boot 3.4, AWS services, demonstrating versatility across modern web technologies
Achieved 99.9% transaction success rate with zero revenue loss through TA-compliant payment monitoring and automated reconciliation for Ocean Park
Implemented production-ready security infrastructure including JWT authentication, OAuth2, rate limiting, HMAC-SHA256 signatures, AES-256-GCM encryption, and comprehensive input validation
Created zero-setup development environments with automatic database migrations, data seeding, and bilingual support (EN/ZH-HK/ZH-CN) across multiple projects

Technologies

Next.js 15

React 19

TypeScript

Java 17

Spring Boot 3.4

Spring Security 6

PostgreSQL

AWS Amplify Gen 2

AWS Cognito

AWS DynamoDB

AWS Lambda

AWS SES

AWS S3

CloudFront

Material-UI

Tailwind CSS 4

next-intl

i18next

@dnd-kit

OAuth2 + JWT

Docker

Maven

Zod

September 2024 - September 20251 year

Overseas Lead Developer (AMS Team)

Tencent

Remote

Led overseas development of Advanced Marketing System (AMS) - a critical payment intermediary and game operations platform bridging Midasbuy payments with game servers, managing gift package distribution, points systems, and operational dashboards for Tencent's international gaming ecosystem.

Key Responsibilities

▪Owned and maintained 6 production systems serving millions of players: Props Warehouse (道具仓库), PaaS Interface Platform, Points/Credits System (积分系统), Log Management (mrms-paas-jfcloud-admin), Monitoring Platform (魔镜), and Operations Portal
▪Delivered 31 feature developments and resolved 20 critical production bugs in first half of 2025, including multi-language template system, self-service export functionality, and gift package workflow optimizations
▪Performed hourly dashboard monitoring (大盘巡查) across all Kubernetes clusters using 魔镜 (Magic Mirror) and Grafana, tracking request volumes, QPS anomalies (≥20% drops), success rates, and system latency with immediate alert response
▪Managed complex incident response following SOPs: rollback procedures with dual confirmation, service scaling (扩容), rate limiting (限流), and feature degradation (降级) for high-traffic scenarios with CPU >50%

Achievements

Maintained 99.9% uptime for critical overseas gaming operations serving millions of international players across multiple regions
Optimized gift package submission flows fixing broken links, missing redemption content, and data consistency issues across platforms
Added Myanmar language support to AMS reward notification email system, expanding international market reach
Resolved complex login session management bugs affecting multiple game platforms, ensuring accurate user authentication
Implemented warehouse enhancements supporting new delivery types (backpack delivery) and optimized 星图系统 redemption logic

Technologies

PHP 8

CodeIgniter

Golang

Vue.js

JavaScript

MySQL/MariaDB

Kubernetes

Tencent Cloud

TStack

Docker

Redis/CKV

Grafana

Nginx

Firebase

IDIP Protocol

June 2023 - September 20241 year 3 months

Full-Stack Developer

Corebase Technologies

Malaysia

Full-stack development across multiple client projects, specializing in PHP/CodeIgniter backend architecture, Next.js frontend applications, and database optimization. Led 3-person team building Ufootball platform and delivered significant performance improvements for external client systems.

Key Responsibilities

▪Architected and developed Ufootball platform (3-layer architecture) with 3-person team: public website (Next.js/React/TypeScript with SSR), backend API (PHP/CodeIgniter), and admin panel (Back Office) connected to MySQL/MariaDB with utf8mb4 charset
▪Implemented comprehensive SEO optimization with meta tags, semantic HTML structure, URL optimization, and server-side rendering, significantly increasing website traffic and search visibility
▪Optimized SQL queries for external client ticketing system achieving 95% performance improvement through strategic indexing, query restructuring (USE INDEX), and eliminating full table scans on high-volume tables
▪Built multi-language content management system with separate *_lang tables for localized content, locale-based API endpoints with GBK to UTF8 conversion, and language-aware fetching supporting English and Chinese (next-i18next)

Achievements

95% improvement in SQL query performance for ticketing report system through indexing and query optimization, drastically reducing execution time from minutes to seconds
Successfully launched Ufootball platform with custom event navigation, iframe embeddings for live events, YouTube video integration, and pagination for news articles
Delivered complete incident and change management modules with reporting capabilities for external client, ensuring timely data access and improved operational efficiency
Implemented server-side rendering (SSR) with Next.js improving initial page load performance and SEO rankings

Technologies

PHP 8

CodeIgniter

Next.js

React

TypeScript

JavaScript

MySQL/MariaDB

AWS SDK

Firebase

Sentry

next-i18next

HTML/CSS

mysqli

November 2022 - February 20233 months

Software Engineering Intern

Software Development Company

Kuching, Sarawak

University internship focused on learning software development fundamentals through XML processing, API development, and testing.

Key Responsibilities

▪Performed XML tagging for legal document processing
▪Created basic RESTful APIs as learning exercises
▪Conducted API testing using Postman
▪Assisted in building attendance tracking system

Technologies

XML

RESTful APIs

Postman