Backend reliability
Inspect the failure paths.
A runnable release gate checks signed content and rejects unsafe releases. Read the source and run the scenarios.
Try the independent code lab ↗Full-stack products · Applied AI
Yuan Zhou
Senior Full-Stack & Applied AI Engineer
I design and ship full-stack products and applied AI systems, from backend architecture and integrations to deployment and operations.
California · U.S. citizen · No sponsorship required
Part of my GolfJoy engineering work: product design, implementation, integrations, and delivery with AI tools.
Engineering you can examine
Full-stack delivery
Follow the engineering decisions.
Regional commerce, venue operations, and device integration. See my contribution, architecture, tradeoffs, and product evidence.
Read the GolfJoy case study ↗Applied AI & systems research
Look beyond the interface.
Source-grounded product guidance, local retrieval systems, and published Android security research inform how I build.
Explore methods and research ↗Selected work
GolfJoy product interfaces, with my engineering contribution and the release status beside each area.
01 / GolfJoy
Run the venue.
Deployed venue platform
I connected booking, pricing, memberships, payments, and venue workflows in one system. Venue-specific rules remain attached to the location they belong to.
Management screens: public venue guide, with test venues and sample records. Read the Play PDF ↗
02 / GolfJoy
Every swing. Live.
Android app available on Google Play
I connected a mobile interface to launch-monitor data through native integrations and a shared sensor protocol core.
Multilingual interfaceLive sensor dataEnglish shot readoutAndroid + iOS integrations
Official Google Play screenshots. Live-metrics image uses sample sensor data.
03 / GolfJoy
Find it. Compare it. Build it.
Public preview
I built product discovery, comparison, a simulator builder, content management, and checkout integration, with source-grounded AI product guidance.
04 / GolfJoy
Built for China, too.
Official China storefront
I built regional commerce and a release path that separates China delivery from cross-border content dependencies.
Project history · 2014–2025
Earlier projects
From BNCopy and local AI systems to document intelligence, native apps, and security research. Product work, prototypes, and research that shaped how I build.
BNCopy
2025
Autonomous trading decision engine
Architected a deterministic decision engine ingesting real-time market data over TCP/WebSocket. Implemented multi-shard execution on GCE, TTL-based deduplication, daily reconciliation, Firestore audit trails, auto-healing VM topology, and Prometheus/Grafana monitoring. Evaluated changes through rolling out-of-sample windows with fee, slippage, and drawdown gates.
- Python
- TCP/WebSocket
- Prometheus
- Grafana
- Docker
Iron Horse Local Chat
2025
Local LLM platform
Built a local LLM platform for offline operation on Apple Silicon. Designed a three-service architecture with llama.cpp inference, a FastAPI backend, and SvelteKit frontend, plus ChromaDB retrieval, model switching, and WebSocket streaming. Used Metal GPU acceleration and local service communication.
- Python
- FastAPI
- SvelteKit
- ChromaDB
- WebSocket
Ethereum Defender
2024
Transaction recovery tooling
Engineered mempool monitoring and transaction recovery tooling for a compromised Ethereum account. Used WebSocket pending-transaction detection, fee-aware counter-transactions, and Flashbots private relay integration.
- Python
- TypeScript
- Flashbots
- WebSocket
- ethers.js
Cards on TON
2024
Blockchain card collection game
Built a TON card collection game with AEON payments, pack purchasing, rarity logic, forging, fragments, referrals, and TON Connect authentication, using React, TypeScript, and Firebase Cloud Functions.
- React
- TypeScript
- TON
- Firebase
- Cloud Functions
Iron Horse RAG AI
2024
Document intelligence platform
Delivered a document intelligence platform with upload, retrieval, merge, and chat workflows. Built dual embedding pipelines, Firestore knowledge bases, Cloud Storage indexing, administration controls, and authenticated uploads through Google OAuth.
- React
- GCP
- Firestore
- Cloud Storage
- OAuth
TTSH Caregiver AI
2024
Clinical assistant
Delivered an AI clinical assistant for Tan Tock Seng Hospital using AWS Lambda, DynamoDB, Bedrock, and API Gateway. Built chat history, sentiment analysis, session management, and deployment tooling in a modular TypeScript codebase with automated tests.
- TypeScript
- AWS Lambda
- DynamoDB
- Bedrock
- CI/CD
Blackjack Computer Vision
2024
Feasibility prototype
Designed and implemented a YOLOv10 proof of concept for blackjack table digitization and playing-card recognition.
- Python
- YOLOv10
- PyTorch
Hodlnodes
2022
Ethereum staking infrastructure
Led design and delivery of an Ethereum staking platform spanning Solidity contracts, WalletConnect/MetaMask, a Next.js frontend, and Firestore. Deployed an ARM Linux staking device with firewall configuration and uptime monitoring.
- Next.js
- Solidity
- Firestore
- ARM Linux
Helix SuperMint
2022
NFT deployment and management
Built an NFT deployment and management platform with React Native and Expo, ERC-721 contracts and ERC721A batch minting, IPFS uploads, Firebase Cloud Functions, Hardhat contract tooling, and a management CLI.
- React Native
- TypeScript
- Solidity
- Firebase
- Hardhat
JGREAnalyzer
2022 publication
Android systems security research
Developed JGREAnalyzer for cross-language analysis and validation of Android resource-exhaustion flaws. The paper reports 21 vulnerable interfaces across 12 of 148 Android 10 system services; nine were exploitable without permissions.
- Android AOSP
- Java
- Static analysis
arcPI Mobile Applications
2014–2016
Native iOS and Android development
Built and shipped native iOS and Android applications with Swift, Objective-C, Java, and Kotlin and supported PHP, MySQL, and MongoDB backend services serving university community users.
- Swift
- Objective-C
- Java
- Kotlin
- PHP
Experience
Full résumé ↗2026 · Completed project-based engagement
GolfJoy · Project lead & sole developer
Completed project-based delivery across storefronts, venue operations, native mobile, and content management, with AI-assisted development and engineering review.
Jul 2021–Mar 2024; returned Nov 2024
Multiverse Labs · Senior Full-Stack Engineer
Engineering roles at Multiverse Labs (multiverse.ai / ironhorse.ai).
Apr 2024, Oct 2024
The Venetian Resort Las Vegas · Digital Innovation Engineer
Jan 2016 – Jan 2017
U.S. Army · AH-64 Apache Armament / Electrical / Avionic Systems Repairer (MOS 15Y)
Jun 2014 – Jan 2016
arcPI · iOS & Android Engineer
Contact
Open to the right senior engineering role
Let’s ship your next product.
Full-stack product engineering and applied AI. Let’s build something people use.
California · U.S. citizen · No sponsorship requiredyuanzhou93@gmail.com