We are looking for a testing engineer to be responsible for functional testing, performance testing, and security testing of the CEX system, ensuring high availability and stability of the system. Main responsibilities: 1. Develop testing plans, design and execute functional testing, performance testing, and security testing. 2. Write automated testing scripts to improve testing efficiency and coverage. 3. Track and report bugs, assist the development team in resolving issues. 4. Participate in requirement review to ensure testing covers all business scenarios. 5. Conduct specialized testing for blockchain related functions such as transactions, wallets, and smart contracts.