Remote Senior Solidity Engineer - DeFi Smart Contracts

Placements24; United States; Remote; USD 180,000 - 240,000; Full time

Job summary

Placements24, a global client seeking DeFi leadership, is hiring a Senior Smart Contract Developer for a fully remote role. You will design, audit, and deploy secure contracts, optimize gas usage, and contribute to scalable DeFi protocols on Ethereum.

Required are 5+ years in software with 3+ years in smart contracts, strong Solidity expertise, and solid grasp of security best practices. Remote collaboration in an asynchronous team is essential, with ongoing security imperatives and performance

Qualifications

• Bachelor's or Master's degree in Computer Science, Engineering, or related field, or equivalent work experience.
• 5+ years of professional software development experience, with at least 3 years focused on smart contract development.
• Expert-level proficiency in Solidity and experience with other smart contract languages (e.g., Vyper, Yul).
• Deep understanding of Ethereum Virtual Machine (EVM) and its nuances.
• Proven experience developing and deploying complex DeFi protocols.
• Strong knowledge of smart contract security best practices, common vulnerabilities, and mitigation techniques.
• Experience with development frameworks like Hardhat, Truffle, or Foundry.
• Familiarity with Web3 libraries (Ethers.js, Web3.js) for interacting with smart contracts.
• Excellent problem-solving skills and meticulous attention to detail.
• Strong communication skills and the ability to work effectively in a fully remote, asynchronous team environment.

Responsibilities

• Design, develop, audit, and deploy secure and gas-efficient smart contracts using Solidity and other relevant languages.
• Collaborate closely with product managers, researchers, and other engineers to define smart contract requirements and specifications.
• Implement complex DeFi protocols, including lending, borrowing, trading, and asset management mechanisms.
• Write comprehensive unit and integration tests to ensure the reliability and security of smart contracts.
• Conduct rigorous security reviews and vulnerability assessments of smart contract code.
• Optimize smart contracts for performance, scalability, and cost-effectiveness.
• Stay up-to-date with the latest developments in smart contract security, DeFi trends, and blockchain technology.
• Contribute to the architectural decisions and technical roadmap of the platform.
• Participate in code reviews, providing constructive feedback to peers.
• Troubleshoot and debug issues related to smart contract execution and on-chain interactions.

Skills

Solidity

Ethereum & EVM knowledge

Remote collaboration

Secure coding practices

Gas optimization

Education

Bachelor's or Master's in CS/Engineering

Tools

Hardhat

Truffle

Foundry

Ethers.js

Web3.js

Job description

Placements24, a global client seeking DeFi leadership, is hiring a Senior Smart Contract Developer for a fully remote role. You will design, audit, and deploy secure contracts, optimize gas usage, and contribute to scalable DeFi protocols on Ethereum.

Required are 5+ years in software with 3+ years in smart contracts, strong Solidity expertise, and solid grasp of security best practices. Remote collaboration in an asynchronous team is essential, with ongoing security imperatives and performance