Location: US or EU only
We are looking for Senior Blockchain Developers to join our engineering team.
You will help build secure and reliable smart contracts for decentralised applications, DeFi products, and blockchain protocols. You should have strong Solidity experience, understand DeFi concepts, and care about smart contract security.
Responsibilities
- Build and maintain smart contracts for DeFi and blockchain applications
- Write secure, clean, and gas-efficient Solidity code
- Create tests using Foundry, Hardhat, Anchor, or similar tools
- Review smart contracts for security issues, bugs, and edge cases
- Analyse risks such as flash loans, oracle attacks, MEV, and governance attacks
- Use tools like Slither, Mythril, Echidna, Certora, Tenderly, and similar tools
- Support audits, bug fixes, and secure contract deployments
- Improve gas usage, storage layout, and contract performance
- Document technical decisions and security assumptions
Requirements
- Strong experience with Solidity and EVM smart contracts
- Experience with Foundry and/or Hardhat
- Good understanding of Ethereum, gas, storage, events, and upgradeable contracts
- Knowledge of DeFi, token standards, staking, lending, AMMs, bridges, and governance
- Ability to write secure and maintainable smart contract code
- Experience testing, debugging, and reviewing smart contracts
- Understanding of common smart contract risks such as reentrancy, access control issues, oracle risks, precision errors, and front-running
- Familiarity with OpenZeppelin and proxy patterns
- Strong attention to detail and good communication skills
Nice to Have
- Experience with Rust, TypeScript, Solana, Anchor, NEAR, or other blockchain ecosystems
- Experience building or auditing DeFi protocols
- Knowledge of fuzz testing, formal verification, or symbolic execution
- Experience with networks like Ethereum, Arbitrum, Base, Optimism, Solana, or NEAR
- Experience with AMMs, lending, bridges, staking, vaults, or governance systems
- Familiarity with Tenderly, Etherscan, Blockscout, The Graph, or indexing tools
What We Offer
- Competitive salary
- Healthcare benefits
- Company-provided computer
- Paid holidays
- Flexible working hours
- Career growth opportunities
- Friendly and supportive engineering team