Huijie Pan

Designed and built Node.js / Express microservices supporting high-scale login and identity flows, processing tens of millions of authentication requests monthly with sub-100 ms p99 latency. Led development of LLM-backed internal tooling using Node.js, Python and OpenAI APIs, reducing manual engineering workflow by roughly 40%. Built full-stack React and Node.js dashboards for real-time monitoring of identity and fraud signals, replacing legacy tools and giving ops teams faster incident response capability. Implemented retrieval-augmented generation (RAG) pipelines with vector search to provide engineers contextual documentation and logs integrated directly to Slack and internal portals. Collaborated with cross-functional teams to migrate legacy Java services to Node.js / Express microservices on AWS, improving deployment frequency and reducing infra costs. Contributed to React component libraries and shared frontend utilities used across 6+ internal applications. Conducted code review

Developed REST API endpoints in Node.js / Express for internal identity and account management services. Built React UI features for internal tools used by customer support and fraud operations teams. Integrated third-party APIs including S3 and AWS to support data processing pipelines. Participated in agile sprints, consistently delivering features on time with strong test coverage.