1. Job Responsibilities:

- Development of test cases and API concurrency stress testing;

- Writing and maintaining automated test cases for smart contracts, covering scenarios such as functionality, boundaries, exceptions, and attack vectors;

2. Test Platform Setup

- Building contract testing frameworks and CI/CD testing platforms based on tools like Hardhat / Foundry, achieving automated construction, deployment, testing, and regression;

3. Fuzz & Security Testing

- Writing Fuzz tests and integrating static analysis tools (such as Slither, Mythril) to uncover contract vulnerabilities and operational boundaries;

4. On-chain Simulation Testing

Constructing on-chain fork testing environments to simulate real user and fund flow testing (mainnet fork or testnet simulation);

5. Script Development

- Writing TypeScript/Python scripts to simulate contract invocation processes, batch deployment, state tracking, and on-chain verification;

6. Testing Monitoring

- Integrating with platforms like Tenderly/Forta/Graph to continuously monitor on-chain contract behavior and performance metrics;

7. Job Requirements:

- Over 2 years of experience in test development, familiar with Solidity and at least one automation testing framework (Hardhat / Foundry / Truffle);

- Proficient in writing contract invocation test scripts using JavaScript / TypeScript / Python;

- Familiar with common DeFi protocols (such as DEX, lending, stablecoins, staking, etc.) and their interaction modes;

- Familiar with the Web3 call stack (Ethers.js / Web3.js / RPC / ABI decoding);

- Experience with on-chain testing, capable of setting up a mainnet fork testing environment for real data simulation;

- Understanding of common smart contract security issues, such as reentrancy, access control, integer overflow, MEV;

- Proficient in Git and CI/CD tools, able to write test integration pipelines (GitHub Actions / Jenkins, etc.);

8. Preferred Qualifications:

- Experience in independently writing Solidity contracts;

- Conducted fuzz testing using Foundry and identified real bugs;

- Familiarity with new chain architectures such as zkEVM, Move, Sway, Hyperliquid L1;

- Knowledge of on-chain analysis platforms such as Tenderly, Defender, Forta, etc.;

- Preference for those who have participated in bug bounty programs or audit processes.