Contact person: Senior React Developer for Multi-Chain dApps

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Location: Tokyo, United States

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"We're looking for a proven Senior React Engineer with over 5 years of experience delivering production dApps on Ethereum, Polygon, and Solana. You'll focus on front-end development using React to build sleek, responsive interfaces, but all screens you deliver must seamlessly communicate with the on-chain logic. This means connecting to wallets, reading and writing contract data, and displaying transaction status in real-time.

Smart contract integration is essential. I'll provide audited contracts, but you'll be responsible for safely calling contracts from the UI and handling error conditions. Knowledge of [login to view URL] or [login to view URL], WalletConnect, and common Layer 2 patterns will help you get started right away.

Key Deliverables
• A React codebase that compiles cleanly and connects to Ethereum, Polygon, and Solana contracts.
• A functional wallet flow (connect, sign, switch networks) tested on mainnet and testnet.
• A clear README with build/run instructions and a brief overview of the integration logic.

Acceptance Criteria
• The frontend passes linting and unit tests, and connects to all three chains without manual code migration.
• UI state updates upon transaction submission and confirmation.
• No console errors, no hard-coded private keys, and a responsive design on desktop and mobile.

Please add links to previous projects.

If your resume does not include experience working on blockchain dApps, this project is not for you. If not, please briefly describe one recent project on each of the three chains to demonstrate your approach to multi-chain development." (client-provided description)