Smart Contract QA Engineer, Atlas Oracle

Coin Market Cap Ltd; Hong Kong; On-site; HKD 600,000 - 1,000,000; Full time

Job summary

Coin Market Cap Ltd in Hong Kong seeks a seasoned QA engineer to design and implement automated testing frameworks for oracle smart contracts, covering unit, integration, and end-to-end tests. You will develop security test cases for price feeds, data retrieval, and multi-party consensus, while simulating stress conditions to evaluate fault tolerance.

Ideal candidates have 3+ years in smart contract testing, are proficient in Solidity and testing tools like Hardhat/Truffle/Foundry, and

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or a related field.
• 3+ years of experience in smart contract testing or development, with proficiency in Solidity and testing frameworks.
• Deep understanding of oracle mechanisms and exposure to common attack vectors.

Responsibilities

• Design and implement automated testing frameworks for oracle smart contracts, covering unit tests, integration tests, and end-to-end tests.
• Develop and execute security test cases focusing on price data feeds, off-chain data retrieval, multi-party consensus, and Sybil resistance.
• Simulate on-chain and network abnormal conditions to conduct stress and fault tolerance testing.
• Collaborate with developers to perform vulnerability scanning and assist in audits before deployment.
• Create and maintain test documentation, defect reports, and quality assessment reports.
• Verify oracle node data accuracy and conduct performance benchmarking.

Skills

Solidity

Smart contract testing

JavaScript/TypeScript

Security testing

Python

Web3.js

Ethers.js

Agile methodologies

Education

Bachelor’s degree in Computer Science or related field

Tools

Hardhat

Truffle

Foundry

OpenZeppelin

Job description

Core Responsibilities:

• Design and implement automated testing frameworks for oracle smart contracts, covering unit tests, integration tests, and end-to-end tests.
• Develop and execute security test cases, focusing on core scenarios such as price data feeds, off-chain data retrieval, multi-party consensus mechanisms, and resistance to Sybil attacks.
• Simulate various on-chain and network abnormal conditions (e.g., high Gas fees, network latency, node failures) to conduct stress testing and fault tolerance testing.
• Work closely with the development team to perform vulnerability scanning and assist in code audits before contract deployment, ensuring no critical security risks.
• Create and maintain clear test documentation, defect reports, and quality assessment reports.
• Participate in verifying the accuracy of oracle node data and conducting performance benchmarking.
• Continuously follow blockchain testing tools and best practices, and introduce new testing methodologies to enhance efficiency.

Requirements:

• Bachelor’s degree or higher in Computer Science, Software Engineering, or a related field.
• 3+ years of experience in smart contract testing or development, with proficiency in Solidity and mainstream testing frameworks (e.g., Hardhat, Truffle, Foundry).
• Deep understanding of oracle mechanisms (e.g., Chainlink, Band Protocol) and awareness of common attack vectors (e.g., flash loan attacks, data tampering).
• Familiar with fundamental blockchain concepts (consensus mechanisms, Gas optimization, event logs, etc.) and tools (e.g., Web3.js, Ethers.js).
• Capable of developing automated testing scripts using JavaScript/TypeScript, Python, or similar languages.
• Experience in security testing or code auditing is preferred, with knowledge of common vulnerabilities (e.g., reentrancy, integer overflow) and mitigation methods.
• Strong communication skills and a collaborative mindset, adaptable to agile development environments.

Preferred Qualifications:

• Hands-on experience in testing or developing oracle projects, with familiarity in decentralized data sources and node networks.
• Knowledge of zero-knowledge proofs, TEE (Trusted Execution Environment), and other privacy-related oracle technologies.
• Experience with performance testing tools (e.g., K6, Gatling) or on-chain monitoring tool development.
• Open-source contributions to blockchain projects on GitHub or demonstrable testing case portfolios.