Yuan Zhou

Project lead & sole developer

Product evidence and case studyGolfJoy Play on Google PlayCompany accomplishment letter (Oct 9, 2026)

• Engineering ownership: Served as project lead and sole developer for regional storefronts, venue operations, the native application, and CMS. Independently handled architecture, implementation, integrations, testing, and delivery with AI development tools and engineering review. [Next.js, React, TypeScript, Payload CMS, PostgreSQL]
• Commerce, CMS, and regional releases: Built the China storefront with customer accounts and payments and the CMS supporting regional content operations. Implemented signed CMS snapshots, atomic deployment, and rollback so releases could run independently of a live cross-border database connection. [Ed25519, Tencent COS, Docker, Release Engineering]
• Commerce and applied AI: Built the U.S. commerce preview with guided product selection, model comparison, an interactive 3D simulator builder, Shopify checkout, and webhook reconciliation. Added an AI assistant using approved sources, response guardrails, and human handoff. [Shopify, OpenAI, RAG, Webhooks]
• Venue platform: Built Play booking and venue management for live venue operations. Implemented calendars, membership pricing, hour packs, waivers, payments, refunds, access control, device ingestion, and operational dashboards with tenant-scoped permissions. [Stripe, RBAC, Multi-Tenant SaaS, IoT]
• Native integration: Delivered the GolfJoy Play Android app published on Google Play, with multilingual interfaces, live shot metrics, landscape layouts, placement guidance, and English shot readout. Integrated Bluetooth discovery and Wi-Fi sensor data through Java/Swift integrations and a shared C++ protocol core. [Capacitor, Java, Swift, C++, Bluetooth]

Senior Full-Stack Engineer · Remote

• Distributed backend: 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, GCE, Firestore, SQLite]
• Local inference: 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, llama.cpp]
• Transaction recovery: 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]
• Document intelligence: 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]
• Clinical AI: 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]
• 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]
• Contract tooling: 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, IPFS]
• Consumer application: 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]

Digital Innovation Engineer · Las Vegas, NV

• Computer vision prototype: Designed and implemented a YOLOv10 proof of concept for blackjack table digitization and playing-card recognition. [Python, YOLOv10, PyTorch]
• Training and evaluation: Generated annotated training frames and evaluated card recognition on recorded camera feeds. This was a feasibility prototype, not a production casino deployment. [Computer Vision, Dataset Generation]
• Event processing: Connected detections to blackjack event logic and SQLite persistence, recording hit, stand, double, and split actions for downstream analysis. [Python, SQLite]

AH-64 Apache Armament / Electrical / Avionic Systems Repairer (MOS 15Y) · Fort Eustis, VA

• Completed AH-64 avionics training, received an Honorable Discharge and the Sky Master commendation, and completed an SSBI background investigation during service.
• Maintained and troubleshot mission-critical avionics, fire control systems, weapon management systems, and electrical subsystems on the AH-64D and AH-64E Apache under strict maintenance protocols and flight safety standards.

iOS & Android Engineer · Denver, CO

• 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, MySQL, MongoDB]