Senior Web3 Developer — Wallet & Smart Contract Integration (Remote, Europe)
- Role
- Blockchain
- Experience
- Senior
- Employment
- Contract
Published by
u/TreacleVivid3507Open to Anywhere in Europe. Set where you work from to check your eligibility.
No BS summary
Senior Web3 Developer, 5+ years experience, must be based in Europe. Needs production hands-on experience with wallet and smart-contract integration using wagmi and viem, MetaMask/wallet flows, and EVM/ERC-20 contracts. Long-term contract paying €5000-7500/month.
Core skills
Required skills
Optional languages
[Hiring] Senior Web3 Developer — Wallet & Smart Contract Integration (Remote, Europe)
Building the wallet architecture, transaction flows, and on-chain integration layer for a production Next.js platform. English fluency required.
Requirements:
\- Over 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.
What you'll do
- Build the wallet architecture, transaction flows, and on-chain integration layer for a production Next.js platform.
- Design reusable integration layers for wallet, transaction and contract interactions.
- Implement user-facing transaction status handling including receipts, event logs and gas estimation.
- Write unit and integration tests and explain technical decisions clearly while working in a distributed team.
What they require
- Over 5 YOE; must have actually shipped hands-on projects involving wallet connection, contract reads/writes, transaction tracking, or token integration.
- Production experience with wagmi and viem; MetaMask/wallet integration including connection/disconnection, account and network switching, chain-change handling.
- Experience with Ethereum-compatible networks, ERC-20 and token-sale contracts, EVM network config, RPC endpoints, contract addresses and ABIs; contract reads/writes, transaction receipts and event logs.
- Strong TypeScript/JavaScript, React, Next.js.
- Must be based in Europe; English fluency required; long-term contract.
Benefits
- €5000-7500/month
- Long-term contract