Built ARIA, a dual-mode accessibility app (React Native + FastAPI on Jetson Orin Nano) with on-device AI inference and SQLite—no external DBs. Implemented real-time ASL + emotion recognition using a multi-model fallback (Gemini, OpenAI, Claude, YOLOv8) with ElevenLabs TTS. Developed obstacle detection + turn-by-turn navigation via WebSockets and Google Maps APIs with low-latency + tunnel support (Cloudflare/ngrok).