Securing the world's largest app store for billions of users globally.

Tech Lead of ATO & Payments Risk team. Co-designed Risk Platform 2.0 architecture, setting a 2-year roadmap for improved fraud detection. Led development of ML-based rule system, achieving 90% ML and 100% rule coverage for all transactions.

Tech Lead of Search Service & Indexing team. Led multi-tier search system project, reducing Elasticsearch costs by 40% and improving P95 latency of top-tier searches by 64%. Spearheaded performance optimization of search APIs, reducing P95 latency of search suggestions by 75%, exceeding industry standards.