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Senior Blockchain Developer Web3 Integrations
- New York, New York, United States
- New York, New York, United States
Über
This role is perfect for an experienced blockchain developer who thrives on solving complex multi‑chain challenges, implementing innovative Web3 protocols, and driving the future of decentralized professional networking.
Candidate requirements
4+ years of blockchain development experience with production deployments
Strong Solidity development skills with experience in complex smart contract architecture
Multi‑chain development experience (Ethereum, Base, Solana, Polygon)
Deep understanding of EVM and blockchain fundamentals
Experience with Layer 2 solutions (Optimism, Arbitrum, Base)
Advanced knowledge of smart contract security best practices and audit processes
Experience with OpenZeppelin contracts and established patterns
Proficiency in testing frameworks (Hardhat, Foundry, Truffle)
Understanding of gas optimization techniques and contract upgradeability
Experience with multi‑signature wallets and timelock mechanisms
Extensive experience with Web3.js/Ethers.js and blockchain API integration
Wallet integration expertise (MetaMask, WalletConnect, Phantom, Rainbow)
Experience with IPFS/Arweave for decentralized storage
Knowledge of GraphQL for blockchain data querying (The Graph Protocol)
RESTful API development for Web3 applications
Understanding of DeFi protocols (Uniswap, Aave, Compound)
Experience with token standards (ERC‑20, ERC‑721, ERC‑1155, SPL tokens)
Understanding of tokenomics and mechanism design
Experience with stablecoin integration and payment rails
Desirable
Experience with zero‑knowledge proofs (zk‑SNARKs, zk‑STARKs)
Knowledge of account abstraction (ERC‑4337) and gasless transactions
Familiarity with MEV protection and transaction optimization
Job responsibilities
Design and develop smart contracts for identity verification, attestation systems, and reputation scoring
Implement cross‑chain bridges and multi‑chain wallet integration
Build escrow systems and payment processing for freelancer marketplace
Develop tokenized bounty and referral systems with automated distributions
Integrate with Base L2, Solana, and other blockchain networks
Implement Layer 2 scaling solutions and optimize gas costs
Build cross‑chain attestation services and reputation portability
Develop multi‑signature wallet systems and account abstraction
Implement zero‑knowledge proof verification systems
Build privacy‑preserving authentication mechanisms
Develop on‑chain credential verification and attestation systems
Integrate stablecoin payment systems (USD1, USDC, etc.)
Implement yield farming and staking mechanisms
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Sprachkenntnisse
- English
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