Smart Contract QA Engineer, Atlas Oracle

CoinMarketCap; Hong Kong; On-site; HKD 548,589 - 705,329; Full time

Job summary

CoinMarketCap in Hong Kong is looking for a Smart Contract Tester to design and implement automated testing frameworks for oracle smart contracts. You will develop security test cases and simulate various abnormal conditions to ensure the robustness of the contracts.

The ideal candidate has a Bachelor’s degree in Computer Science and over 3 years of experience in smart contract testing with knowledge of Solidity and testing frameworks. Strong communication skills are essential for collaboration in agile environments.

Qualifications

• 3+ years of experience in smart contract testing or development.
• Proficiency in Solidity and mainstream testing frameworks.
• Deep understanding of oracle mechanisms and common attack vectors.

Responsibilities

• Design and implement automated testing frameworks.
• Develop and execute security test cases.
• Simulate on-chain and network abnormal conditions for testing.

Skills

Smart contract testing

Solidity

JavaScript/TypeScript

Python

Communication skills

Education

Bachelor’s degree in Computer Science or Software Engineering

Tools

Hardhat

Truffle

Foundry

Web3.js

Ethers.js

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