Building the wallet architecture, transaction flows, and on-chain integration layer for a production Next.js platform.
English fluency required.
Requirements:
\- Atleast 5 YOE
\- Real shipped project involving wallet connection, contract reads/writes, transaction tracking, or token integration — hands-on ownership, not exposure
\- wagmi and viem in production, MetaMask/wallet integration, connection/disconnection, account and network switching, chain-change handling
\- Ethereum-compatible networks, ERC-20 and token-sale contracts, EVM network config, RPC endpoints, contract addresses, ABIs
\- Contract reads/writes, transaction receipts, event logs, gas estimation, user-facing transaction status
\- Strong TypeScript/JavaScript, React, Next.js
\- Designs reusable integration layers, understands wallet/transaction/contract integration risks, writes unit and integration tests
\- Can explain technical decisions clearly, works effectively in a distributed team
€5000-7500/month, long-term contract.
DM with: Resume, LinkedIn, years of hands-on Web3 experience, GitHub/portfolio, timezone + availability.
Must have actually shipped this before.
Must be based in Europe.