• Migrated a monolithic Redis application to a cloud-based Redis cluster, eliminating single points of failure and significantly improving system fault tolerance. • Managed the daily operations of virtual machines and Kubernetes clusters, implemented automated CI/CD pipelines, and established an efficient alerting mechanism. Reduced incident response time by 70%, significantly improving system stability and minimizing downtime risks. • Led the evaluation and integration plan for the Vault key management system, enabling centralized management of sensitive data, significantly improving data security, and ensuring system compliance with industry security standards. • Implemented a cloud-based rate limiting strategy to effectively defend against OWASP Top 10 common attacks and mitigate DDoS risks. Ensured the system consistently met Service Level Objectives (SLO), significantly improving stability and security. • Upgraded PHP from version 7.1 to 8.3, significantly improving system performance and security. Achieved a zero-downtime transition, ensuring uninterrupted service and improving the user experience. • Upgraded the MySQL database from version 5.7 to 8.0, enhancing query performance and data security. Conducted comprehensive compatibility testing to achieve a seamless transition, ensuring stable system operations and enhancing the user experience. • Implemented a Nuxt 2 graceful shutdown mechanism to ensure connection stability during server restarts, significantly reducing user disconnection rates and improving the overall user experience. • Served as an on-call engineer for 17LIVE's global system services, quickly diagnosing and resolving issues to ensure stable system operations and a consistently exceptional user experience. • Integrated a cross-border supply chain system that successfully facilitated product entry into the Japanese market and resulted in a 25% increase in total order revenue, significantly boosting international business expansion efforts.

• Developed an automated notification system that achieved a stable monthly delivery of 90,000 messages and increased SMS revenue by 45%. • Utilized AJAX, pagination, message queues, and caching technologies, combined with optimized SQL queries and database indexing, to successfully reduce API response time by 90%, significantly improving system performance and user experience. • Integrated and maintained over 10 domestic and international third-party services, significantly improving service integration, reducing the frequency of related issues, ensuring stable system operations, and consistently delivering an exceptional user experience. • Co-developed a multilingual system prototype that enabled product support for multiple languages and laid the groundwork for expansion into international markets, driving global business growth. • Worked with the operations team to integrate digital marketing analytics tools to accurately track user behavior and provide data-driven decision support for product optimization and feature enhancements.

• Implemented AJAX, pagination, image sprites and resource preloading, and used bundling and CDN caching technologies to reduce page load time by 80%. • Utilized message queues and caching mechanisms to reduce API response time by 70%. • Optimized SQL queries and rebuilt database indexes, improving query performance by 90%. • Integrating third-party login services resulted in a tenfold increase in user registrations. • Refactored legacy code based on OWASP best practices to prevent vulnerabilities, mitigate common issues such as injection and cross-site scripting, and improve overall system security. • Implemented a recommendation algorithm proposed by domain experts and modularized the algorithm to facilitate the development of related digital products and patent applications. • Developed an automated web crawler to collect data for the recommendation algorithm and assisted domain experts with data cleaning and labeling to improve the recommendation quality. • Refactored the data structure of the recommendation algorithm to support dynamic parameter inputs, increasing recommendation accuracy by 30%.