Senior React-Blockchain Integration -- 2

I need a senior React engineer with a proven five-plus-year track record delivering production dApps on Ethereum, Polygon, and Solana. Your primary focus will be front-end work—building sleek, responsive interfaces in React—but every screen you ship must seamlessly talk to on-chain logic. That means wiring up wallet connections, reading and writing contract data, and surfacing transaction states in real time.

Smart-contract integration is essential. While I will supply audited contracts, you’ll be responsible for invoking them safely from the UI and handling error states. Familiarity with ethers.js or web3.js, WalletConnect, and common Layer-2 patterns will help you hit the ground running.

Core deliverables
• A React codebase that compiles cleanly and connects to my Ethereum, Polygon, and Solana contracts
• Functional wallet flow (connect, sign, network switch) tested on mainnet and testnet
• Clear README with build/run instructions and a brief overview of the integration logic

Acceptance criteria
• Front-end passes linting, unit tests, and connects to all three chains without manual code switches
• Transactions submit and update UI status through confirmation
• No console errors, no hard-coded private keys, and responsive design across desktop/mobile

If your résumé doesn’t already showcase blockchain dApp work, this isn’t the right fit. Otherwise, let’s talk—please outline one recent project for each of the three chains so I can see your approach to multi-chain development.

Don't bid from India, Pakistan and Bangladesh.