Job Description and Responsibilities: Responsible for API design, development, optimization and maintenance of back-end services; Study codes and operating principles of mainstream digital assets; Participate in requirements review and product function design, transforming requirements into high-quality code; Design, implement and optimize back-end service infrastructure. Qualifications and Skills: Bachelor's degree or above in computer-related majors; 3+ years of back-end development; Familiar with Python/Golang/C++/Java; Familiar with PostgreSQL, Redis, MQ, Docker; Understanding of service-oriented, asynchronous, high-availability, and scalability architectures; K8S experience preferred; Familiar with Bitcoin and Ethereum principles; Experience in cryptography, encryption algorithms and network security preferred; Good coding and documentation habits; Strong responsibility, communication, and feedback receptiveness.