Bondex is hiring a

Senior Blockchain Developer (Web3 Integrations)

Overview
We're seeking a Senior Blockchain Developer to lead the technical implementation of cutting-edge Web3 integrations across multiple blockchain ecosystems. You'll be responsible for architecting and developing complex integrations with DID providers, Layer 2 solutions, educational platforms, and DeFi protocols while building scalable on-chain identity and reputation systems.

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