Senior Smart Contract Engineer
Core
Design, implement, test, and maintain production-grade smart contracts and backend services for Circle's core protocols across EVM and Solana ecosystems.
Role type
Senior Smart Contract Engineer (Solidity/Rust)
Builds
Secure, scalable blockchain-based financial services and transaction orchestration layers
Domain
Blockchain infrastructure / DeFi / Fintech
Deliverable
production ML models | product features
Required skills
Solidity, Rust, Anchor framework, smart contract security principles, gas optimization, Foundry/Hardhat, AWS/GCP/Azure backend services, event processing, indexing
Preferred skills
Multi-chain/cross-chain systems, Web3 fintech/DeFi experience, open-source protocol auditing, non-EVM chain development
Technologies
Solidity, Rust, Anchor, Foundry, Hardhat, AWS, Google Cloud, Microsoft Azure
Responsibilities
Design and implement production-grade smart contracts; Develop backend services and integration layers; Optimize smart contract performance and security; Build transaction orchestration and indexing services; Test, deploy, and manage upgrades; Partner with security teams on audits and threat modeling
Seniority
Senior, hands-on IC