Senior Blockchain Engineer – Smart Contracts & Custody Infrastructure

As a Senior Blockchain Engineer at Fam Investment, you will own the design, development, and deployment of smart contracts and custody infrastructure. You'll work on mission-critical systems including ERC-20 token creation, Ethereum integration, and custody-to-wallet transaction execution, ensuring secure and optimized blockchain operations.

What you'll do

• Design, develop, deploy, and maintain Solidity smart contracts on Ethereum and other EVM-compatible networks, including access controls, multisignature authorization, and secure contract execution.
• Create and deploy ERC-20 tokens and other token standards, implementing minting, burning, transfers, vesting, and distribution mechanisms.
• Develop and maintain token management systems, configure token permissions and supply controls, and integrate tokens with MetaMask, Phantom, and other compatible wallets.
• Analyze and troubleshoot proprietary cryptocurrency custody infrastructure and execute authorized transfers from custody systems to external wallets.
• Diagnose and resolve transaction signing, broadcasting, confirmation, and execution issues, including RPC errors, nonce conflicts, and gas issues.
• Configure and manage Ethereum RPC connections, maintain Linux/VPS environments, and develop backend integrations using Node.js, TypeScript, Python, ethers.js, and web3.py.
• Implement secure transaction monitoring and blockchain event tracking, optimize transaction processing and system reliability.
• Debug, test, upgrade, and optimize existing smart contracts; investigate contract execution failures and transaction reverts.
• Conduct vulnerability assessments and coordinate smart contract audits, applying secure development practices.
• Troubleshoot blockchain nodes, APIs, and smart contract integrations to ensure successful on-chain transaction execution.

What you bring

• 5+ years of relevant blockchain engineering experience.
• Advanced proficiency in Solidity and the Ethereum Virtual Machine (EVM).
• Proven experience creating and deploying ERC-20 tokens.
• Strong knowledge of smart contract architecture, testing, and security.
• Demonstrated hands-on experience with custody infrastructure and wallet transaction execution.
• Advanced knowledge of Ethereum Mainnet, RPC, transaction lifecycle, and blockchain explorers.
• Proficiency in JavaScript/TypeScript, Node.js, Python, ethers.js, and web3.py.
• Experience with Hardhat, Foundry, and OpenZeppelin.
• Strong Linux/VPS and API troubleshooting skills.
• Ability to independently diagnose and resolve complex blockchain infrastructure issues.
• Understanding of MPC, multisignature wallets, hardware security modules (HSM), and private-key management.

What we offer

• Competitive salary with attractive bonuses.
• Full-time or contract employment in Dubai, UAE.

About Fam Investment

Fam Investment operates in blockchain, Web3, and digital assets, building custody and smart contract infrastructure for cryptocurrency operations.