Shiyun Tian

Software Engineer @1 Thing Org

Boston, MA, US

Refactored legacy web-only architecture into a scalable cross-platform app using React Native Firebase, reducing code duplication by 50% and improving release velocity• Designed and enforced QPS and quota limits using Firestore Rules and Cloud Functions, validated with Jest and custom scripts, reducing simulated write spike errors by ~45% in pre-launch tests• Built a write activity tracker with audit logs to power QPS and quota systems, enabling visibility into user behaviors and supporting rule debugging and abuse analysis• Integrated Redux RTK Query to optimize API caching and state flow across core views, reducing data fetch latency by 30% in component load benchmarks• Hardened Firestore security by implementing scoped, role-based access rules, preventing unauthorized reads/writes and improving data protection coverage in rule validation tests• Implemented third-party authentication (Google, Apple, Facebook) to streamline onboarding and reduce registration friction, validated in test environments with increased completion success• Tech Stack: Typescript, Firestore Rules, Cloud Functions, React Native, Redux RTK, Firebase, Bash, CSS