Circle

5 months ago

Senior Smart Contract Engineer

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 3 hours agoStatus: Live

Job Summary

Design, implement, test, and maintain production-grade smart contracts across EVM (Solidity) and Solana (Rust/Anchor), while building the backend services that integrate with those contracts. Own transaction orchestration, event listening, and indexing services that bridge on-chain and off-chain systems, and optimize performance with strong security practices. Partner with protocol, infrastructure, and security teams to deliver auditable, reliable solutions in production.

Location: Taipei

Workplace: Remote

Employment Type: Full time

Job Function: Solutions Engineering & Sales Engineering

Seniority: Mid level

Key Responsibilities

•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.
•Research and apply design patterns and best practices in smart contract and distributed systems engineering.
•Optimize smart contract performance (including gas efficiency) using secure architecture and defensive coding practices.
•Build and maintain transaction orchestration flows, event listeners, and indexing services; test, deploy, and manage upgrades in production while partnering with security teams for audits and monitoring.

Key Requirements

•Proven experience designing and developing production-grade smart contracts in Solidity and/or Rust with a strong focus on security, gas optimization, and performance.
•Deep understanding of blockchain architecture, EIP standards, decentralized systems, and on-chain execution models.
•Strong knowledge of smart contract security principles and common vulnerability patterns (e.g., reentrancy, access control flaws, arithmetic errors).
•Experience with smart contract development and testing frameworks such as Foundry, Hardhat, or Anchor.
•Working knowledge of backend development for blockchain-interacting services (transaction submission, event processing, indexing) and experience deploying scalable cloud services in AWS, Google Cloud, or Azure.

Experience:BlockchainWeb3Smart contractsDeFiFintech

Skills:Security-mindedCross-functional collaborationDefensive codingPerformance optimizationSystems design

Tech Stack:SolidityRustAnchorSolanaEVMFoundryHardhatAWSGoogle CloudMicrosoft Azure

Company Brief

Circle

Provides blockchain-based financial infrastructure and stablecoins (notably USDC and EURC) and payment solutions for enterprises, developers, and financial institutions to enable programmable money and global payments.

Industry: Fintech Infrastructure

Company Size: Large (251 to 1,000 employees)

Revenue: USD 1B+

Growth: Public Company

Valuation: Public Company (Market Cap in USD)

Funding: IPO / Publicly Listed

Headquarters: New York City, United States

Founded: 2013

Glassdoor: 4.1

Website LinkedIn Glassdoor

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Circle

5 months ago

Senior Smart Contract Engineer

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 3 hours agoStatus: Live

Job Summary

Location: Taipei

Workplace: Remote

Employment Type: Full time

Job Function: Solutions Engineering & Sales Engineering

Seniority: Mid level

Key Responsibilities

•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.
•Research and apply design patterns and best practices in smart contract and distributed systems engineering.
•Optimize smart contract performance (including gas efficiency) using secure architecture and defensive coding practices.
•Build and maintain transaction orchestration flows, event listeners, and indexing services; test, deploy, and manage upgrades in production while partnering with security teams for audits and monitoring.

Key Requirements

•Proven experience designing and developing production-grade smart contracts in Solidity and/or Rust with a strong focus on security, gas optimization, and performance.
•Deep understanding of blockchain architecture, EIP standards, decentralized systems, and on-chain execution models.
•Strong knowledge of smart contract security principles and common vulnerability patterns (e.g., reentrancy, access control flaws, arithmetic errors).
•Experience with smart contract development and testing frameworks such as Foundry, Hardhat, or Anchor.
•Working knowledge of backend development for blockchain-interacting services (transaction submission, event processing, indexing) and experience deploying scalable cloud services in AWS, Google Cloud, or Azure.

Experience:BlockchainWeb3Smart contractsDeFiFintech

Skills:Security-mindedCross-functional collaborationDefensive codingPerformance optimizationSystems design

Tech Stack:SolidityRustAnchorSolanaEVMFoundryHardhatAWSGoogle CloudMicrosoft Azure

Company Brief

Circle

Industry: Fintech Infrastructure

Company Size: Large (251 to 1,000 employees)

Revenue: USD 1B+

Growth: Public Company

Valuation: Public Company (Market Cap in USD)

Funding: IPO / Publicly Listed

Headquarters: New York City, United States

Founded: 2013

Glassdoor: 4.1

Website LinkedIn Glassdoor