💻 Full Stack Developer
Charles Zhang
Portfolio
Full stack developer specializing in Python, Java, TypeScript, and backend technologies. Creating innovative solutions from a Discord economy bot to real-time collaborative platforms.
CZ
Charles Zhang
Featured Projects
A selection of my recent work showcasing full-stack development expertise
Created August 2025
Pixel Pocket
Live pixel placement with real-time interactions
Real-time collaborative pixel art platform supporting multiple users with serverless Redis for state management and cached blob storage for performance.
TypeScriptReactRedisBlob Storage
Live
Created July 2025
FK Services
Tax accountant's professional landing page
Professional landing page for tax accounting services featuring modern design, responsive layout, and optimized user experience for client acquisition.
TypeScriptReactNext.js
Live
Created May 2025
oTransform
A platform for AI Chatbots
Advanced AI chatbot platform enabling businesses to create intelligent conversational experiences with natural language processing and machine learning capabilities.
TypeScriptReactAI/ML APIs
Live
About Me
Full Stack Developer
I ship production software end to end, from fast React frontends to reliable backends and systems. My recent work spans an AI chat platform, a real-time pixel canvas with Redis, and a professional landing website for a tax accountant firm. Using a CI/CD workflow, I make sure all my apps and websites run smoothly. I have hands-on experience in virtualization R&D, automation, and data-driven systems, plus community projects that reached hundreds of thousands of users.
My Highlights
- • Scaled a Java Discord bot to 206k total users across 2,300 servers through SEO and smooth operations.
- • Built a Redis-backed r/place clone with realtime updates, and optimized a 95% reduction in command throughput.
- • Delivered client work, including a tax accountant firm's landing site.
- • In a data science class, a Kaggle Machine Learning class winner with a 99.27% AUC public score, clear lead over second place 95.82%.
Frontend
TypeScriptReactNext.jsTailwind CSSTkinter
Backend
PythonNode.jsRedisSQL (MySQL, MariaDB)FlaskREST APIsServerless deploymentsC++LinuxKubernetesDockerBashGitHubVercel
Machine Learning
AUC evaluationBoth LDAsK-means ClusteringK-fold Cross ValidationCNNs, DNNs, NNsRandom ForestAutogluonPCAXGBoost, LightGBMt-SNESVMs
All Projects
A comprehensive look at my work, from AI platforms to collaborative applications
Mystiuak, a Java Discord Currency Bot
Multi-sharded chatbot used by 206k users in 2,300 servers, with DB-backed state and SEO-driven discovery. Powered by JDA, Mystiuak enables server communities to level up their server activity and encourage an economic social currency useful for trade and socialization.
JavaJDASQL
Agar.io Private Server
An Agar.io private server with over 1M impressions and hundred of active users at peak on a OVH VPS via a Ogar deployment. VPS only accessible via Linux SSH.
Real-time networkingWebSocketsOpsNode.jsVPSSSH
Botsu Therapy Chatbot
Desktop chatbot with sentiment-aware LEDs on Raspberry Pi, persistent user history, and a playful Tkinter UI.
PythonTkinterMariaDBRaspberry PiREST APIs
NERSC Tape Library Diagnostics App
Flask service that connected to Google Sheets to ingest tape library logs for troubleshooting and analysis.
PythonFlaskGoogle Sheets API
Virtualization Platform Evaluation
Researched and prototyped an oVirt replacement path for the NERSC Operations datastream, focusing on reliability and maintainability.
LinuxVirtualizationResearch
Faculty Computer Refresh System
SharePoint + Power Apps solution that cataloged faculty devices, automated forms, and streamlined campus-wide deployment.
Microsoft PowerappSharePointExcel VBA
Kaggle ML Competition Model
Top score 0.9927 public leaderboard in a course competition with a robust training pipeline and careful validation.
PythonK-Folds Cross ValidationRandom ForestNeural NetworksAI
Get In Touch
Interested in working together? Let's discuss your next project.