Main responsibilities: Design, develop, and maintain the core backend system of cryptocurrency exchanges. Optimize system performance to ensure stability and low latency in high concurrency scenarios. Implement and maintain the security mechanism of the exchange, including identity verification, authorization, data encryption, etc. Integrate with blockchain technology to handle functions such as cryptocurrency deposit and withdrawal, transaction matching, etc. Write high-quality code, conduct code reviews, and ensure the maintainability and extensibility of the code. Participate in system architecture design, propose improvement suggestions, and drive technical decisions. Monitor and troubleshoot issues in the production environment, and promptly repair and optimize the system.