238 Solidity jobs in the United States

Job Description

Career Renew is recruiting for one of its clients a Senior Solidity Engineer - this is a fully remote role and candidates can be based in PST - CAT timezones.

We are on a mission to redefine capital markets infrastructure through cutting-edge on-chain derivatives and protocol architecture. We’re seeking a highly experienced Senior Solidity Engineer (or VP of Engineering , depending on seniority fit) to join our remote-first team. This is a pivotal leadership role within our smart contract engineering group, working alongside the Chief Protocol Officer, Engineering Manager, and cross-functional product leaders to build next-generation EVM-based DeFi infrastructure.

The team comes from established protocols, hedge funds, and market makers, and is backed by Polychain, Van Eck, Binance, Selini, Hashed, and others.

Key Responsibilities

• Serve as one of the primary owners of Solidity development within a high-performing team of 6 smart contract engineers.

• Architect, develop, and optimize secure, gas-efficient smart contracts powering Concrete’s DeFi protocol.

• Contribute to protocol design, audits, and security reviews with deep technical ownership.

• Collaborate with product and project managers to align technical deliverables with roadmap priorities.

• Drive the evolution of Concrete’s on-chain architecture, with potential to scale across multiple chains.

• Stay ahead of developments in the Ethereum ecosystem and contribute to open-source efforts as relevant.

Requirements

• 3–4+ years of professional experience writing secure Solidity smart contracts.

• Proven engineering background within an EVM-based DeFi protocol .

• Strong understanding of smart contract testing, deployment frameworks, and upgradeability patterns.

• Familiar with Solidity optimization, gas cost analysis, and safe architectural practices.

Nice to haves

• Experience with cross-chain architectures , L2s, and bridging protocols.

• Technical familiarity with DeFi primitives such as vaults, lending markets, interest rate modeling, and asset management.

• Prior leadership experience or desire to grow into a VP-level technical leadership role.

Why Join Concrete

• Work with a tight-knit, world-class team shaping the future of decentralised derivatives.

• Enjoy a fully remote culture with high trust, flexibility, and ownership.

• Competitive compensation + unlimited PTO and other flexible benefits.

Compensation & Package

Competitive compensation + unlimited PTO and other flexible benefits.

• Design, develop, test, and deploy secure and efficient smart contracts using Solidity on Ethereum and other EVM-compatible blockchains.
• Contribute to the architecture and design of blockchain-based applications and protocols.
• Implement and manage decentralized applications (dApps) from concept to production.
• Collaborate with cross-functional teams, including product managers, designers, and frontend developers, to translate requirements into robust blockchain solutions.
• Conduct thorough code reviews, ensuring code quality, security, and performance of smart contracts.
• Identify and mitigate potential security vulnerabilities in smart contracts and blockchain protocols.
• Research and stay updated on the latest advancements in blockchain technology, Web3 development, and cryptographic principles.
• Write comprehensive technical documentation for smart contracts and dApps.
• Participate in the development of tokenomics and decentralized governance models.
• Troubleshoot and resolve issues related to smart contract execution and dApp performance.
• Contribute to the community through open-source development and knowledge sharing.
• Mentor junior blockchain developers and promote best practices within the team.

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Minimum of 4 years of professional software development experience, with at least 2 years focused on blockchain and smart contract development.
• Proficiency in Solidity and experience with smart contract development frameworks like Hardhat, Truffle, or Foundry.
• Strong understanding of Ethereum Virtual Machine (EVM) and blockchain fundamentals.
• Experience with decentralized finance (DeFi) protocols and non-fungible tokens (NFTs) is highly desirable.
• Familiarity with other blockchain technologies (e.g., Polygon, Binance Smart Chain, Solana) is a plus.
• Experience with version control systems (e.g., Git) and agile development methodologies.
• Excellent problem-solving, analytical, and critical-thinking skills.
• Strong communication and teamwork abilities.

• Design, develop, and deploy secure and audited smart contracts using Solidity for various blockchain platforms.
• Architect and build decentralized applications (dApps) and DeFi protocols.
• Write high-quality, well-documented, and testable code.
• Conduct thorough security audits and penetration testing of smart contracts.
• Optimize smart contracts for efficiency, gas cost reduction, and scalability.
• Collaborate with the product team to define smart contract requirements and features.
• Integrate smart contracts with front-end interfaces and backend services.
• Stay updated on the latest trends and advancements in blockchain technology and DeFi.
• Contribute to technical discussions and decision-making processes.
• Mentor junior blockchain developers and contribute to team knowledge sharing.

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
• 5+ years of experience in software development, with a strong focus on blockchain and smart contract development.
• At least 3 years of hands-on experience with Solidity programming.
• Deep understanding of the Ethereum Virtual Machine (EVM) and blockchain architectures.
• Proven experience in developing and deploying DeFi protocols or dApps.
• Familiarity with blockchain security best practices and common vulnerabilities.
• Experience with development tools like Truffle, Hardhat, and Ganache.
• Knowledge of web3.js or ethers.js for front-end integration.
• Excellent analytical, problem-solving, and debugging skills.
• Strong communication and collaboration abilities.

• Lead the design, development, and implementation of smart contracts using Solidity and other relevant programming languages.
• Architect robust and scalable decentralized applications (dApps) and blockchain solutions.
• Write clean, efficient, secure, and well-documented Solidity code, adhering to best practices and security standards.
• Conduct thorough smart contract audits and security reviews to identify and mitigate vulnerabilities.
• Integrate smart contracts with front-end interfaces and back-end services.
• Collaborate closely with product managers, designers, and other developers to define project requirements and technical specifications.
• Optimize smart contracts for gas efficiency and performance.
• Stay up-to-date with the latest advancements in blockchain technology, smart contract development, and security practices.
• Mentor and guide junior blockchain developers, fostering a culture of learning and high-quality development.
• Participate in code reviews, providing constructive feedback and ensuring code quality across the team.
• Troubleshoot and debug smart contracts and dApp functionalities.
• Research and evaluate new blockchain platforms, tools, and protocols for potential integration.
• Contribute to the overall technical strategy and roadmap for blockchain initiatives.
• Ensure the security and integrity of deployed smart contracts and blockchain applications.
• Develop comprehensive testing strategies, including unit testing, integration testing, and end-to-end testing for smart contracts.

• Bachelor's or Master's degree in Computer Science, Engineering, or a related technical field.
• Minimum of 6 years of software development experience, with at least 3 years specifically in blockchain development and smart contract programming (Solidity).
• Deep understanding of blockchain fundamentals, including consensus mechanisms, cryptography, and distributed ledger technology.
• Expertise in Solidity, with a strong understanding of the Ethereum Virtual Machine (EVM).
• Proven experience in developing, testing, and deploying secure smart contracts.
• Familiarity with decentralized finance (DeFi) protocols and concepts.
• Experience with blockchain development frameworks (e.g., Truffle, Hardhat, Ganache).
• Knowledge of front-end development technologies (React, Vue.js) and back-end integration is a plus.
• Experience with security analysis tools and methodologies for smart contracts.
• Excellent problem-solving, analytical, and debugging skills.
• Strong leadership, communication, and collaboration abilities.
• Familiarity with version control systems like Git.
• Experience with other blockchain platforms (e.g., Binance Smart Chain, Polygon) is advantageous.