Available for opportunities

Johnny Lui

Software developer & CS student at CUHK.
Full-stack, cloud, and cybersecurity.

Download CV Get in Touch GitHub

About

A bit about me

I'm a passionate Computer Science student at The Chinese University of Hong Kong with a strong focus on full-stack development, cloud computing, and cybersecurity. I enjoy building seamless mobile and web applications using React Native, AWS, and modern JavaScript frameworks. Beyond coding, I actively compete in CTF cybersecurity competitions as a finalist and lead university event organisations — combining technical depth with leadership. Driven by curiosity and innovation, I aim to create secure, user-centric technologies that make a real difference.

Experience

Work history

07/2024 — Present
Goodnotes Limited
IT Infrastructure Intern Contractor
  • Developed scripts to connect SaaS services and automate internal processes
  • Assisted in routine IT support to ensure smooth daily operations
  • Contributed to research and comparison of IT solutions focused on security & innovation
06/2025 — 08/2025
Petalife
Full Stack Developer Intern
  • Built and deployed a cross-platform mobile app with React Native + AWS Lambda / NestJS
  • Collaborated in an agile team to deliver production-ready features within sprint deadlines
  • If you can't login or receive a push notification at 3 AM, it's probably my fault :p
06/2024 — 07/2024
OTIS Elevator
Digital Technology Summer Intern
  • Developed a chatbot for customer support to reduce staff workload
  • Automated paper forms into digital workflows with JavaScript and SQL on a low-code platform
09/2022 — 08/2023
I-Charge Solutions International
Intern Programmer
  • Built Charging Station Management System (CSMS) on OCPP 1.6 in Java
  • Created Car Park Display Board for real-time charger availability in Python
  • Integrated Kiosk with Octopus & Soepay payments using Vue.js + Express.js
01/2021 — 09/2022
Freelance
Discord Bot Developer
  • YouTube Live Notifications Bot — scrapes live data and posts to Discord channel in Python
  • YouTube Membership Auth System using OAuth2 + Discord API in Python Flask
  • Email Verify Bot — OTP to school email with regex validation in Node.js

Skills

Technologies

Frontend
HTML5CSS3JavaScript TypeScriptReact NativeVue.js Tailwind CSS
Backend
Node.jsExpress.jsNestJS PythonJavaFastAPI FlaskDiscord.js
Database
MySQLMariaDBPostgreSQL MongoDBRedisFirebase
DevOps & Cloud
GitDockerAWS AzureGoogle CloudCI/CD LinuxJira
Other
Proxmox VEWiresharkCTF / Cybersecurity

Recognition

Awards & Certifications

🏆
Champion — PolyU NuttyShell CTF 2024
Team Leader, Tertiary Institution Category · 9,434 pts
🥈
1st Runner Up — CUHK CTF 2024
CUHK Category
🛡️
HK Cyber Security New Gen CTF 2023
Ranked 58th / 311 teams · 19th in tertiary category
🎓
Faculty Admission Scholarship
The Chinese University of Hong Kong
🌟
Talent Development Scholarship
The Chinese University of Hong Kong
☁️
AZ-900 · AI-900 · DP-900 · PL-900
Microsoft Azure Fundamentals · 2025
📊
Microsoft Office Specialist Associate
Excel, Word, PowerPoint · 2024
🔖
Google Cloud Skill Badges
Essentials · Baseline Infrastructure · Foundational Tasks

Work

Featured Projects

CourtBot
🤖
CourtBot
Discord bot with automated notifications, HK transit/weather data, AI chat, and utility commands for private server management.
Node.jsDiscord.js OpenAIAxios
Code
CUHK Exam Timetable Converter
📅
CUHK Exam Timetable Converter
Converts CUHK exam timetable from Excel to iCalendar format for easy import into any calendar app.
HTMLCSS JavaScriptiCalendar
Code Demo

Contact

Get in touch

Open to internships, part-time roles, and interesting projects. Feel free to reach out — I usually respond within a day.

johnny@cslui.com
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