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Senior Smart Contract Engineer

ironclad ledger • Ukraine
Remote
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Design, build, and deploy secure smart contracts on Ethereum and EVM-compatible networks for DeFi, NFT, and cross-chain projects. Develop comprehensive test suites, conduct security audits, and perform gas optimization using Foundry or Hardhat. Requires 5+ years of professional Solidity experience, deep EVM knowledge, and a security-first mindset.

Key Highlights
Fully remote role available for full-time or part-time (20+ hours/week) engagement.
Competitive hourly pay of $40 - $60 USD, negotiable based on experience and location.
Focus on security-first development with internal audits and proactive vulnerability mitigation.
Key Responsibilities
Design, implement, and deploy secure, efficient, and well-documented smart contracts on EVM chains.
Develop and maintain comprehensive test suites using Foundry or Hardhat to ensure contract security and functionality.
Conduct internal security reviews and audits to identify and mitigate potential attack vectors.
Perform gas optimization and analysis to ensure cost-effective contract execution.
Document architecture decisions, design patterns, and technical specifications for all developed solutions.
Stay up-to-date with the latest advancements in the Web3 ecosystem, including new EIPs and security best practices.
Technical Skills Required
Solidity Foundry Hardhat
Benefits & Perks
Competitive Pay: $40 - $60 USD/hour
Fully Remote work from anywhere
Flexible Commitment: Full-time or Part-time options
Nice to Have
Experience with Rust or Go
Knowledge of Layer 2 scaling solutions and cross-chain messaging protocols
Familiarity with account abstraction (ERC-4337) and its applications
Experience with zero-knowledge proofs or privacy-preserving technologies

Job Description

Ironclad Ledger is a blockchain development company building sophisticated solutions across Ethereum and EVM-compatible networks. We specialize in DeFi protocols, NFT marketplaces, and cross-chain infrastructure, helping advance the Web3 ecosystem through secure and scalable smart contract development.

About the Role

We are looking for a Senior Smart Contract Engineer to design, build, and deploy secure smart contracts on Ethereum and EVM-compatible networks. You will work on DeFi, NFT, and cross-chain projects, collaborating with our team to deliver reliable Web3 solutions.

This is a remote role available for either full-time or part-time (20+ hours/week) engagement.

Key Responsibilities

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