The Role Design, develop, test, deploy, and maintain secure, gas-efficient Solidity smart contracts and decentralized applications on EVM-compatible networks. Responsibilities include contract testing with Foundry or Hardhat, gas optimization, code reviews, security audit remediation, dApp and backend integration, deployment automation, upgrade patterns, CI/CD, on-chain monitoring, and incident response. The role also requires staying current with EIPs, EVM changes, and smart contract security practices. Summary Generated by Built In We are seeking a talented Solidity Smart Contract Developer to design, build, and maintain secure, gas-efficient smart contracts on EVM-compatible networks. You will work closely with our engineering, product, and security teams to deliver production-grade decentralized applications (dApps) and protocol infrastructure. This is a hands-on role for someone who thrives in a fast-moving Web3 environment and cares deeply about code correctness and security. Key Responsibilities Design, develop, test, and deploy Solidity smart contracts (ERC-20, ERC-721, ERC-1155, and custom protocol logic) Write comprehensive unit and integration tests using Foundry and/or Hardhat Perform gas optimization and code refactoring for efficiency and readability Conduct internal code reviews and participate in external security audit processes Integrate smart contracts with frontend dApps via ethers.js/viem and backend services Collaborate with auditors to remediate findings and document security decisions Maintain deployment scripts, upgrade patterns (proxy contracts), and CI/CD pipelines Monitor on-chain activity and respond to incidents post-deployment Stay current with EIPs, EVM changes, and emerging security best practices Required Qualifications 2+ years of professional Solidity development experience (or equivalent demonstrable portfolio) Strong understanding of the EVM, gas mechanics, and smart contract security patterns Proficiency with Foundry and/or Hardhat, plus Git and CI/CD workflows Experience with OpenZeppelin contracts and common token standards Solid grasp of blockchain fundamentals: accounts, transactions, reentrancy, access control, upgradability Working knowledge of JavaScript/TypeScript for testing and integration Strong written communication skills for technical documentation Nice to Have Experience with DeFi protocols, NFTs, DAOs, or Layer 2 solutions Familiarity with The Graph, IPFS, or oracle integrations (Chainlink) Understanding of formal verification tools (Certora, Slither, Mythril) Prior experience responding to or participating in security audits Contributions to open-source Web3 projects Rust or Go experience for cross-chain or backend work What We Offer Competitive salary (range: $120,000 - $180,000 USD, depending on experience) + token/equity incentives Remote-first culture with flexible hours Learning budget for courses, conferences, and certifications Opportunity to work on cutting-edge decentralized technology with a collaborative team How to Apply Submit your resume, GitHub profile, and links to deployed contracts or audit reports. Candidates may be asked to complete a short take-home smart contract challenge. Read Full Description Skills Required 2+ years of professional Solidity development experience or equivalent demonstrable portfolio Strong understanding of the EVM, gas mechanics, and smart contract security patterns Proficiency with Foundry and/or Hardhat, Git, and CI/CD workflows Experience with OpenZeppelin contracts and common token standards Understanding of blockchain fundamentals, including accounts, transactions, reentrancy, access control, and upgradability Working knowledge of JavaScript or TypeScript for testing and integration Strong written communication skills for technical documentation Experience with DeFi protocols, NFTs, DAOs, or Layer 2 solutions Familiarity with The Graph, IPFS, or Chainlink oracle integrations Understanding of formal verification tools such as Certora, Slither, or Mythril Prior experience responding to or participating in security audits Contributions to open-source Web3 projects Rust or Go experience for cross-chain or backend work Squadsy Compensation & Benefits Highlights The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Squadsy and has not been reviewed or approved by Squadsy. About This Summary Equity Value & Accessibility — Foundational roles are described as featuring equity-heavy compensation typical of early-stage tech ventures, suggesting potential upside for early joiners. Feedback suggests equity is a core element of offers rather than an ancillary perk. Wellbeing & Lifestyle Benefits — The company is described as fully remote within the United States, indicating flexibility that can support work-life balance. Feedback suggests remote-first operations offer location flexibility for employees. Learn more about Squadsy's Compensation & Benefits → Squadsy Insights What's It Like to Work at Squadsy? Squadsy Culture & Values Squadsy Career Growth & Development What's the Work-Life Balance Like at Squadsy? Squadsy Leadership & Management Squadsy Company Growth, Stability & Outlook View all jobs at Squadsy View Squadsy Profile Report Job