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Circle

Senior Smart Contract Engineer

Circle

Smart Contract Engineer designing, implementing, and maintaining smart contracts primarily in Solidity and Rust for Circle's blockchain-based services.

Posted 6/22/2026full-timeRemote • 🇹🇼 TaiwanSeniorWebsite

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
SolidityRustsmart contract developmentbackend developmentgas efficiency optimizationsecure architecturedefensive coding practicessmart contract testingsmart contract deploymentsmart contract upgrades
Soft Skills
collaborationcross-functional teamwork
Tools & Technologies
FoundryHardhatAnchor
Industry Keywords
EVMSolanasmart contract securityvulnerability patternsblockchain networksoff-chain infrastructure

Tech Stack

Tools & technologies
RustSolidity

About the role

Key responsibilities & impact
  • 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 and defensive coding practices
  • Test, deploy, and manage upgrades for smart contracts and backend services in production environments

Requirements

What you’ll need
  • Proven experience designing and developing production-grade smart contracts in Solidity and/or Rust
  • Strong knowledge of smart contract security principles and common vulnerability patterns
  • Experience with smart contract development and testing frameworks such as Foundry, Hardhat, or Anchor
  • Working knowledge of backend development, particularly services that interact with blockchain networks
  • Experience integrating smart contracts with backend systems and off-chain infrastructure
  • Strong collaboration skills with the ability to work cross-functionally with product, infrastructure, and security teams

Benefits

Comp & perks
  • Flexible work environment
  • Transparency
  • Visibility in operations