Senior Smart Contract Engineer

Senior Smart Contract Engineer at Circle, Taiwan/Remote. Build production-grade smart contracts on EVM/Solana with Solidity/Rust, backend integrations, gas optimization, and security.

Circle (NYSE: CRCL) is one of the world's leading internet financial platform companies, building the foundation of a more open, global economy through digital assets, payment applications, and programmable blockchain infrastructure. Circle's platform includes the world's largest regulated stablecoin network anchored by USDC. What you'll work on - Design and implement production-grade smart contracts across EVM and/or Solana ecosystems using Solidity and Rust - Develop backend services and integration layers that interface with deployed smart contracts and internal systems - Optimize smart contract performance, including gas efficiency, while enforcing strong security through secure architecture - Build and maintain transaction orchestration flows, event listeners, and indexing services - Partner with security teams on audits, threat modeling, remediation, and production monitoring

Core Requirements - Proven experience designing and developing production-grade smart contracts in Solidity and/or Rust, with strong emphasis on security and gas optimization - Deep understanding of blockchain architecture, EIP standards, decentralized systems - Experience with smart contract development and testing frameworks such as Foundry, Hardhat, or Anchor - Experience designing and deploying production-grade, scalable cloud services in AWS, GCP, or Azure

Remote work; location: Taiwan.