Johnny Lui

Hi, I'm Johnny Lui

Software Developer | CTF Player | Cloud & DevOps Enthusiast

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About Me

I am 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 technologies like React Native, AWS, and modern JavaScript frameworks. Beyond coding, I actively engage in cybersecurity competitions as a CTF finalist and lead university event organizations, combining my technical skills with leadership. I’m driven by curiosity and innovation, aiming to create secure, user-centric technologies that make a real difference.

Work Experience

IT Infrastructure Intern Contractor

Goodnotes Limited

07/2024 - Present
  • Developed scripts to connect SaaS services and automate internal processes
  • Assisted in routine IT support tasks to ensure smooth daily operations
  • Contributed to research and comparison of IT solutions focusing on security and innovation

Full Stack Developer Intern

Petalife

06/2025 - 08/2025
  • Built and deployed a cross-platform mobile app with React Native frontend and AWS Lambda/NestJS backend
  • Collaborated in an agile team to deliver production-ready features within sprint deadlines
  • If you cannot login to the app or receive push notification at 3AM, it's probably my fault :p

Digital Technology Summer Intern

OTIS Elevator

06/2024 - 07/2024
  • Developed a chatbot for customer support to reduce staff workload
  • Automated traditional paper forms into digital workflows using JavaScript and SQL on a low-code platform

Intern Programmer

I-Charge Solutions International

09/2022 - 08/2023
  • Developed Charging Station Management System (CSMS) based on Open Charge Point Protocol 1.6 using Java
  • Created Car Park Display Board System for real-time charger availability visualization using Python
  • Integrated Kiosk System with Octopus and Soepay payment methods using Vue.js and Express.js

Discord Bot Developer

Freelance

01/2021 - 09/2022
  • Developed YouTube Live Notifications Bot that sends notifications to a designated Discord channel by scraping live data from the YouTube channel page using Python
  • Created YouTube Membership Authentication System by using OAuth2 to retrieve user information from Discord using Python Flask regarding their YouTube account and automatically cross-referencing the scraped comments with membership details from live streams to bypass YT’s API limit
  • Developed Email Verify Bot to confirm the identification of users by delivering an OTP to their school email address with regex validated using Node.js

Skills & Technologies

Frontend

HTML5 CSS3 JavaScript TypeScript React Native Vue.js Tailwind CSS

Backend

Node.js Express.js NestJS Python Discord.js Java FastAPI Flask

Database

MySQL MariaDB PostgreSQL MongoDB Redis Firebase

DevOps & Tools

Git Docker AWS CI/CD Linux Azure Google Cloud Jira

Other Skills

Proxmox VE Wireshark CTF Cybersecurity

Awards & Certifications

Awards & Competitions

  • Champion - PolyU NuttyShell Capture-the-Flag (CTF) 2024

    Team Leader of Champion team in Tertiary Institution Category with 9434 points

  • 1st Runner Up - CUHK Capture-the-Flag (CTF) 2024

    1st Runner Up in CUHK Category

  • Hong Kong Cyber Security New Generation CTF Challenge 2023

    Ranked 58th out of 311 active teams, 19th among tertiary institution category

  • Faculty Admission Scholarship

    The Chinese University of Hong Kong

  • Talent Development Scholarship

    The Chinese University of Hong Kong

Certifications

  • AZ-900 Microsoft Azure Fundamentals

    Microsoft - 2025

  • AI-900 Microsoft Azure AI Fundamentals

    Microsoft - 2025

  • DP-900 Microsoft Azure Data Fundamentals

    Microsoft - 2025

  • PL-900 Microsoft Power Platform Fundamentals

    Microsoft - 2025

  • Microsoft Office Specialist Associate (Office 2019 Excel, Word, PowerPoint)

    Microsoft - 2024

  • Google Cloud Skill Badges: Essentials, Baseline Infrastructure, Perform Foundational Infrastructure Tasks

    Google Cloud - 2024

Featured Projects

Get In Touch

I'm always open to discussing new projects, creative ideas, or opportunities to be part of your visions.

[email protected]