Full-stack engineer
shipping production
AI systems.

AI Medical Board Exam Platform

A production AI platform for PMHNP / FNP students. RAG pipeline over 1536-dim vector embeddings, SSE-streamed chat, and an AI Case Simulator where the model plays the patient.

• →3-tier memory system (short-term / summary buffer / long-term behavior) for infinite-length chat under token limits
• →Generic chat orchestrator — new AI products via config, no core changes
• →Study Plan generator with 3 adaptive modes + XP leaderboards
• →Video pipeline: Mux UpChunk, HLS, auto-transcripts feeding vector search

Real-Time Team Collaboration Platform

Custom Firebase chat + workspace with typing indicators, @mentions, reactions, read receipts — plus a project-scoped Vault for team secrets.

• →20+ real-time pages on Firestore onSnapshot with proper cleanup + offline persistence
• →Granular RBAC (admin / manager / employee) enforced by Firestore security rules
• →PWA with Vite PWA plugin — installable, service worker cache, FCM push
• →Sidebar 'new content' indicators via lastViewed timestamp diff

Cross-subdomain sessions · reload-safe assessments

The hard-to-see infra: silent JWT refresh with a request queue, and a quiz engine that survives a hard refresh mid-question with timer + answer state intact.

• →Axios interceptor queues failed requests during refresh, retries on new token
• →Cross-subdomain auth sync via BroadcastChannel API
• →PerformanceNavigationTiming + sessionStorage for reload recovery
• →Question prefetching keeps the next question 0ms away