[Job Responsibilities] 1. Participate in the research and development of large-scale B-end platforms, and can independently be responsible for the design, development, and maintenance of subsystems. 2. Participate in the development of C-end business, be able to correctly view project historical debts, promote and solve them. 3. Focus on user experience, be able to conduct feasibility analysis from a data perspective, promote project improvement and implementation. 4. Cooperate with other engineers in research and development, and deliver high-quality requirements