Senior Frontend Engineer specializing in React, TypeScript, and frontend architecture, with deep experience building custodial and self-custodial wallet systems and other high-complexity, data-intensive applications.

I enjoy owning frontend systems end-to-end, solving ambiguous problems independently, and delivering reliable, production-grade user experiences.

• 🏗 Frontend Architecture — Design scalable, maintainable frontend systems for complex products
• ⚛️ React & TypeScript — Modern React patterns, performance optimization, predictable state management
• 🔐 Wallet & Web3 UX — Custodial & self-custodial wallets, multi-chain support, transaction flows, DApp integrations
• 🚀 Startup Ownership — Built a self-custodial wallet from 0 → 1 at an early-stage startup, contributing to a successful Binance investment
• 🤖 AI-Assisted Development — Heavy daily user of Claude Code (primary) and Windsurf to accelerate development and iteration

• Senior Frontend Engineer @ Hex Trust (Hong Kong)
  Building institutional-grade custodial account and digital asset platforms, focusing on reliability, performance, and security.

• Senior Frontend Engineer @ Zecrey Protocol (Startup)
  Early frontend engineer owning architecture and delivery of a self-custodial Web3 wallet across browser extension, web, and mobile — built with full ownership in a highly ambiguous environment.

Frontend
React · TypeScript · Next.js · TanStack Query · Zustand · Tailwind · MUI

Web3 / Wallet
ethers.js · WalletConnect · Multi-chain RPC

Testing & Tooling
Playwright · Docker · Git · CI/CD

AI Tools
Claude Code · Windsurf

I focus on real production systems rather than demo projects.

• 🔐 Wallet & Account Systems (Custodial / Self-Custodial)
• 🌐 DApp Interfaces (NFT staking, asset management, transaction flows)
• 🧱 Reusable Frontend SDKs & Shared Infrastructure

(More details available upon request.)

• GitHub: @jasonzhouu
• Email: jasonzhouu@gmail.com
• Location: Hong Kong

I enjoy working on complex frontend problems where product, architecture, and user experience truly matter.

📊 Weekly development breakdown

Markdown         10 hrs 28 mins  ████████████░░░░░░░░░░░░░   47.37 %
TypeScript       10 hrs 18 mins  ███████████▓░░░░░░░░░░░░░   46.61 %
JSON             1 hr 3 mins     █▒░░░░░░░░░░░░░░░░░░░░░░░   04.80 %
JavaScript       5 mins          ░░░░░░░░░░░░░░░░░░░░░░░░░   00.40 %
Text             4 mins          ░░░░░░░░░░░░░░░░░░░░░░░░░   00.37 %