• Design internal ad review service to moderate ads to ensure policy compliance, protecting user trust and safety.

• Designed and build organization fraud review system to detect fraudulent advertiser, fraud attack and prevent revenue loss.

• Build real-time product moderation pipelines processing hundreds of millions of items per day, cutting review latency and compute cost through async and parallel processing.

• Led migration of core services to Service Mesh with CI/CD automation, improving reliability & observability.

Built and maintained the housing rental platform, developing website and backend services to support millions of properties listings across the U.S.