Haibo Zhang

Own frontend architecture and delivery across UR's full product line — consumer crypto banking, B2B corporate accounts, marketing site, enterprise console and cross-platform apps — while also contributing to Go services and on-chain contracts. UR Bank Web (fe-ur-bank) — flagship crypto banking product · frontend owner Sole primary owner of the Next. js 14 App Router + Type Script web app: a Turborepo monorepo shipped as a fully static export (output: 'export'), covering 20+ business domains — auth, KYC, fiat on/off-ramp, crypto send/receive, swaps, bank cards, USDe earn, referrals, security settings — across 790+ TS/TSX files. Designed a three-tier component architecture: components/ui (Radix + shadcn primitives) → components/biz (feature components) → containers (Redux-connected page containers), backed by 20+ Redux Toolkit slices using create Async Thunk + Promise. all Settled for parallel loading with graceful degradation. Built the Turnkey MPC wallet authentication system: email OTP (Geetest CAPTCHA + rate limiting), Google OAuth and Passkey/Web Authn step-up verification, plus a Session Manager singleton (Deferred Promise-based blocking session) and a Client Manager request-signing pipeline. As a static export with no server middleware, the entire auth and session-security model runs client-side. Delivered six-chain support (Ethereum / Arbitrum / Base / Mantle / Monad / BSC) via wagmi + Reown App Kit + viem — balances, transfers, approvals and swaps — with bignumber. js for uniform token precision; fixed a parse Units precision bug in amount validation. Shipped EIP-7702 delegated account support and authored an in-house turnkey-viem adapter layer (accounts / signing / policy) bridging Turnkey signing to viem transactions. Integrated Sumsub KYC WebSDK, Fiat24 bank accounts and cards, fiat on-ramp and an FX conversion panel; handled complex transaction states such as CWD refund linkage and tx Hash fallback rendering. Built the partner whitelabel / Web View solution: per-partner routing, currency visibility, bank-transfer entry points and isolated session handling, enabling multiple channel partners to launch on the platform. Performance & quality: replaced bitmap-in-SVG icons and oversized PNGs with WebP to cut initial payload; Bundle Analyzer size governance; full Sentry coverage; pre-commit type-check + ESLint gates; patched dependency CVEs (e. g. swiper CVE-2026-27212). Supported bilingual EN/ZH (next-intl) and a four-environment API routing and feature-flag system. Corporate Accounts (fe-corporate / corporate-account) — B2B Next. js 16 + React 19 + Tailwind v4 + Tan Stack Query + Vitest, implementing a "self-custodied accounts, non-custodial assets" architecture. Each company maps to a Turnkey sub-org with a 2-of-3 root quorum (owner passkey / recovery credential / platform co-signing key) — the platform alone cannot move company assets. Built the full co-signing workflow UI: member initiates → owner passkey signs first → platform review signs second → broadcast on-chain. Used next. config. ts rewrites () to proxy /api/v1/* same-origin to the Go service, sidestepping CORS entirely and letting the refresh-token cookie land on the frontend domain. Implemented the company creation wizard, member & RBAC management, KYB gating and Sumsub frontend integration. Marketing site, console, cross-platform and on-chain ur-website — Next. js 16 + React 19 + MDX + GSAP / Lenis / Framer Motion brand site; ur-enterprise-dashboard — Vite + React 19 + Ant Design 6 + wagmi / viem + Zustand operations console. ur (cross-platform monorepo) — Expo SDK 54 + React Native 0.81 + react-native-web targeting web, iOS and Android from one codebase, with shared core / store / api / ui / auth / turnkey-auth / geetest packages under Turborepo + pnpm. ur-bank (Go / go-zero) — contributed OTP auth refactoring, the Kafka-driven email-job pipeline and the corporate KYB invitation template system. agent-pay — self-hosted x402 facilitator on Mantle, using USDC's EIP-3009 transfer With Authorization for gasless single-transaction settlement, with server/client SDKs and a service-discovery registry. ur-topup-contract-sol — cross-chain top-up contracts on Hardhat / Foundry / Anchor + Layer Zero; ur-indexer — Envio on-chain data indexer; ur-liveness-check-sdk — Rollup-bundled liveness detection SDK. Developer productivity — built a Sentry → AI auto-fix → Git Hub draft PR → Lark approval card pipeline (Hono webhook service + Git Hub App + Actions) and wired automated PR code review into CI, cutting the time from production error to merged fix.

Shipped two products from zero to one in three years: first a centralized NFT marketplace in the NFT division, then the multi-chain wallet extension and SDKs after moving to the Web3 division. Web3 Division ｜ Multi-chain wallet browser extension & SDKs (0 → 1) Led the design and development of the Bybit Wallet browser extension from zero to one — account and key management, transaction signing, DApp connection and authorization, and asset display — growing rapidly after launch to 200,000+ cumulative users; continuously refined the experience, lifting the Chrome Web Store rating from under 3 stars to 4 stars. Built multi-chain asset management, expanding chain support from EVM to 8 chains (Ethereum / Solana / SUI / Aptos / Stacks / Bitcoin / Ton / Tron) while handling differences in account models (account-based vs UTXO), derivation paths and signature algorithms (secp256k1 / ed25519). Designed and implemented a unified Web3 SDK reused across three clients — the extension wallet, Telegram Mini Wallet and the mobile app — wrapping major public-chain SDKs behind one connect / sign / transact interface, keeping transaction response times under 300ms. Delivered a JS SDK for the Flutter app: given Flutter's limited Web3 ecosystem, it let the app integrate new chains efficiently and independently, without depending on app release cycles. Developed standards-compliant universal DApp APIs per chain for better compatibility and stability; introduced security policies and encryption schemes to protect user assets; ensured Chrome / Edge cross-browser compatibility and wrote complete technical documentation and sample code for team collaboration and third-party developers. Architecture & ecosystem: led Web3 technical architecture design and frontend development standards; researched and integrated trending public-chain ecosystems; ran regular tech-sharing and training sessions helping Swap / Airdrop / Staking teams understand Web3 concepts (wallet interaction, transaction initiation, on-chain state queries) to accelerate delivery. NFT Division ｜ Centralized NFT marketplace (0 → 1) Core frontend engineer building the exchange's centralized NFT marketplace from zero — collection browsing, listing and delisting, order matching, personal assets and trade history — shipped during the peak of the NFT market.

Built the frontend for a hotel SaaS platform, led frontend technology selection and standards, and contributed to infrastructure system design — end-to-end ownership from UI to infra within a small team. Designed and implemented an enterprise-grade frontend architecture integrating Node. js / Docker / K8s, streamlining the development workflow and improving team efficiency.

Career break during the COVID-19 pandemic.

Built web experiences for high-concurrency music products serving hundreds of millions of users, safeguarding service stability; optimized page performance to keep first-screen load under 1 second. Implemented a BFF architecture to improve frontend–backend communication efficiency, developed shared SDK components to boost team productivity, and supported campaign page development.