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cryptodefidevweb3
About this role
Join CoinMarketCap as a Smart Contract QA Engineer to design automated testing frameworks for oracle smart contracts, ensuring security and performance in a remote, full-time role.
Description
CoinMarketCap is a leading cryptocurrency data aggregator, providing real-time market data and insights to users worldwide. We are committed to enhancing the blockchain ecosystem through innovative solutions.
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.
Job Details
Salary$80,500–$138,000
LocationRemote
AI Score★★★★★★★★★☆ 9/10
PostedApr 24, 2026 (118d ago)
Tags & Skills
cryptodefidevweb3QA Engineerremote
Tech Stack
SolidityJavaScriptTypeScriptPythonHardhatTruffleFoundryWeb3.jsEthers.js