SDE@Amazon Ads. Projects highlight:1 - Personalized Shopping Video and Live Stream ContentLed the design and implementation of a pivotal backend service, a milestone project for Amazon Ads 2022. This service personalizes Amazon shopping live stream content, enhancing user engagement and revenue.• Designed the system structure to achieve customized product recommendations, leading to revenue growth per user by more than 20% in 2022.• Managed high-traffic loads, successfully supporting up to 30k+ transactions per second (TPS) while maintaining a P99 latency of less than 100ms.• Optimized request-sending strategies on the mobile end to better handle real-time changes, resulting in a 20%+ reduction in peak loads during specific periods, maintaining efficient service response times.• Achieved a remarkable 40%+ increase in monthly active users in the United States market.2 - Alexa Integration for Amazon FireTV DevicesLed a milestone project on the 2023 roadmap of Amazon Ads, integrating Alexa Voice Assistant for FireTV. This significantly improved user experience in the living room and increased the 30-day retention rate by 20%.• Designed a brand-new service structure integrating Alexa Voice Assistant on Amazon FireTV devices.• Scaled up supporting backend services to handle higher traffic, up to 30k+ TPS.• Created a user-friendly interface on the Amazon FireTV devices with guides to facilitate new features.• Conducted an internal beta test involving over two hundred Amazon employees from diverse technical backgrounds, fostering comprehensive testing and valuable feedback collection.

Compiler Developer for IBM Compiler Team. Mainly working on optimizations for IBM Compiler and LLVM• Led the implementation of Dead Code Removal by integrating cycle-detecting algorithms, resulting in a 12% reduction of inactive compilation symbols, thereby raising the performance of the IBM PL/I compiler.• Contributed to the design of key code-generation optimizations for IBM Mainframe architectures, as part of IBM’s commercial compiler set serves over 1.2 million users globally.