Xiaoduo(Sarah) Yang

I’m a full-stack software engineer who delivers production-ready web applications—from responsive React/Angular frontends to RESTful Node.js/Express backends, MySQL schemas, and AWS deployments. I’m especially strong at integrating third-party APIs at scale, designing resilient layers for OAuth flows, webhooks, and rate limiting while keeping systems reliable under load.

At Intuit, I improved customer query routing accuracy by 22% by owning end-to-end full-stack development across React components, Express API routes, MySQL changes, and AWS deployment—integrating CRM, analytics, and notification APIs with structured retry logic and error normalization. I also cut integration development time by 30% by standardizing OAuth 2.0 and API key authentication in a reusable Node.js integration library, and sustained reliability with async worker pools, circuit breakers, and dead-letter queues to ensure zero data loss.

Before that, I increased repeat search sessions by 25% by extending a full-stack product application with real-time price tracking and personalized recommendations. I’ve also driven backend throughput from 75 to 150 QPS under sub-200ms response times by restructuring MySQL queries and using NGINX load balancing, and built end-to-end indoor positioning features by connecting Android BLE telemetry to Node.js ingestion, a MySQL store, and a React dashboard with Google Maps.