Job responsibilities: 1. Review and improve the security of our blockchain applications, including smart contract and protocol level security. 2. Develop and implement a comprehensive Web3 security framework and strategy. 3. Review code and architecture, identify and correct potential security vulnerabilities and errors. 4. Design and implement security auditing and testing processes, including penetration testing and vulnerability scanning. 5. Investigate security incidents, manage security incident response processes, and provide recovery strategies. 6. Maintain the latest understanding of industry security standards and best practices to address new threats and vulnerabilities. 7. Create and maintain the company's data protection policy and privacy policy. 8. Collaborate with the team to provide training and awareness raising activities on safety issues.