Senior Frontend Engineer

As a Senior Frontend Engineer at Hyphen Connect, you lead the frontend architecture and core module development of large-scale decentralized applications. You design systems that seamlessly interact with multiple blockchain networks (EVM and non-EVM chains) and integrate with wallets and protocols across Web3 ecosystems.

What you'll do

• Lead frontend architecture design and core module development for large-scale dApps using Vue 3 (Composition API + Vite) and React (Hooks + Concurrent Mode)
• Implement seamless interactions with multiple blockchain networks, including EVM chains (Ethereum, Polygon, etc.) and non-EVM chains (Solana, Sui, etc.)
• Encapsulate frontend smart contract calls, including ABI parsing, transaction construction, signing and sending, state listening, and error handling
• Deeply integrate mainstream wallets including EVM-compatible browser and mobile extension wallets (MetaMask, Trust Wallet, etc.), Solana wallets (Phantom, Backpack, Slope, etc.), and Sui wallets (Sui Wallet, Martian, Ethos, etc.)
• Integrate the WalletConnect protocol to support cross-device, cross-platform, and multi-chain wallet connections
• Build a unified Wallet Adapter Layer to abstract differences between chains and wallets, improving code reusability and maintainability
• Optimize frontend performance and user experience to ensure smooth interactions even in low-latency and weak network environments

What you bring

• Bachelor's degree or higher in Computer Science or a related field
• 10+ years of frontend development experience
• 5+ years of dApp development experience on production-grade projects that have gone live (e.g., NFT Marketplaces, DeFi platforms, DAO tools, Wallet Aggregators)
• Proficiency in both Vue and React with deep understanding of reactivity principles, Virtual DOM, and state management frameworks (Pinia/Vuex, Redux/Zustand)
• Hands-on architecture experience with large-scale SPA or SSR applications, familiar with engineering practices such as micro-frontends, component library design, and performance monitoring
• Deep understanding of browser fundamentals, rendering performance, memory management, and first-screen loading optimizations, backed by practical tuning experience
• Familiarity with EVM mechanisms and proficiency in calling Solidity contracts using ethers.js, viem, or web3.js, with solid understanding of gas costs, event log parsing, and transaction lifecycle
• Familiarity with the Solana development model and proficiency in @solana/web3.js or @solana/wallet-adapter for account management, transaction signing, and program calls
• Familiarity with Sui Move language fundamentals and Sui.js SDK, capable of object querying, transaction building, and wallet interactions
• Proficiency in WalletConnect v2 protocol with proven integration experience across Web, Mobile, PWA, and other scenarios
• Clear understanding of Decentralized Identity (DID), wallet signature verification (Personal Sign and Sign Typed Data), Nonce anti-replay attacks, and other Web3 security mechanisms
• Clean code structure with strong abstraction capabilities and scalable design thinking
• Strong cross-functional collaboration skills with effective communication across backend, smart contract, and UI/UX teams
• Attentiveness to Web3 security best practices with strong awareness of preventing phishing attacks, permission abuse, and frontend vulnerabilities