Solidity developer

Our client is a fast-growing software engineering company building cutting-edge solutions in the blockchain and Web3 space. They specialize in open-source technologies and work across innovative ecosystems such as Ethereum, Cosmos, and Solana, creating infrastructure and applications that push the boundaries of decentralized technology. With a globally distributed team, they foster a remote-first culture and drive innovation in the DeFi sector.

The Role 🚀

We’re looking for a Solidity Developer with a deep passion for DeFi and building the future of finance on the blockchain. In this role, you will be responsible for the entire lifecycle of smart contract development for EVM-compatible chains. You will architect, implement, and deploy secure, gas-efficient, and highly reliable smart contracts that power a new generation of DeFi products. You’ll be a key technical voice in a fast-paced international team, ensuring the integrity and performance of our on-chain logic.

What You'll Do

• Develop, and deploy complex, secure, and optimized smart contracts using Solidity.
• Write comprehensive test suites using frameworks like Hardhat or Foundry to ensure contract correctness and security.
• Implement and manage contract deployment and upgrade strategies, including the use of proxy patterns.
• Prioritize security and gas optimization in all phases of development, staying ahead of the latest common vulnerabilities.
• Collaborate with backend and frontend teams to create seamless integrations between on-chain and off-chain systems.
• Participate in rigorous code reviews and work with external auditors to ensure the highest level of security.

Tech Stack 💻

• Ecosystems: Ethereum (EVM), Cosmos, Solana, SUI
• Languages: Solidity, TypeScript, Rust, Golang
• Frameworks & Libraries: Hardhat/Foundry, ethers.js/web3.js, OpenZeppelin Contracts
• Tools: Docker, Protobuf, Grafana, OpenTelemetry, GitHub Actions, Git.

You might be a good fit if you have... 🧰

• Strong proficiency in Solidity and a deep understanding of the Ethereum Virtual Machine (EVM).
• A proven track record of shipping complex, production-grade smart contracts to an EVM mainnet.
• Hands-on experience with modern development and testing frameworks like Hardhat or Foundry.
• In-depth knowledge of smart contract security principles, common attack vectors, and best practices.
• Experience with common token standards (ERC-20, ERC-721, ERC-1155) and DeFi primitives.
• Proficiency with Git and collaborative development workflows.
• A self-starter mentality, with the ability to work independently and take ownership of complex tasks.
• Upper-Intermediate English proficiency or higher.

✨ Nice to have:

• Backend development experience using Node.js/TypeScript or Golang.
• Familiarity with other blockchain ecosystems like Cosmos or Solana.
• Experience with smart contract auditing tools and methodologies.
• Experience with CI/CD pipelines for smart contract deployment (GitHub Actions preferred).
• Strong DegenScore.

What We Offer 🎁

• Daily support for your technical and personal growth.
• A professional and very friendly team, always ready to help and support.
• Medical Insurance.
• Flexible working hours.
• Offices in Ukraine.
• All official holidays, paid vacation, and sick leave.
• Legal, tax, and accounting services.
• The company provides all necessary work equipment.
• Fitness support and English classes.
• The company pays 50% of the cost of refresher courses.
• Mentoring, educational programs, and regular corporate activities.
• Advanced Bonus System.