Senior full-stack engineer focused on AI application engineering and production delivery. TypeScript / JavaScript as primary (frontend + Node.js service layer), Python for the AI engineering service layer (FastAPI / AutoGen), and a Java enterprise-backend foundation (Spring / Hibernate / EJB), covering end-to-end frontend, backend and AI delivery.
At PayPal I led the Planner / Specialist / Evaluator three-role verification loop (PSE verification-governance methodology), turning Vibe Coding output into reproducible, evidence-driven engineering assets; backed by a toolchain of AutoGen migration agent, MCP (Figma / Serena / Playwright) and Playwright E2E, covering payment-migration verification and the CIP / COS core systems.
My open source focuses on AI engineering: rag-task-service (Rust / axum seven-layer RAG retrieval pipeline), datapulse (deterministic Text2SQL + ReAct dual-path AI BI workbench), autogen-pse (PSE multi-agent collaboration skeleton), and spring-rbac (a microservice system grown from RBAC auth) — each paired with an open-sourced architecture write-up.
Before PayPal, I led the front-end integration of Disney Resort’s AI digital-human customer service system (Three.js / react-three-fiber 3D rendering with real-time voice), and for a long time led Trip.com’s international site content platform, covering React, Next.js, Node.js SSR, SEO, multilingual content and mobile experience.