chatBCP — AI Construction Assistant

Built a full-stack AI chat assistant for construction professionals using Next.js 16, React 19, and a FastAPI microservice with Google Gemini for streaming multimodal responses.

Implemented hybrid RAG search using local Nomic embeddings (sentence-transformers) and PostgreSQL pgvector for CSI MasterFormat code lookup, with Brave Search API integration and Upstash Redis caching.

Engineered AI-powered proposal generation with 7-section templates, digital dual-signature workflow, and multi-format exports (PDF, Word, Excel), plus real-time English/Spanish translation via Google Cloud Translation API.

Deployed Stripe subscription billing with webhook handlers for full lifecycle management and shipped cross-platform iOS and Android apps via Capacitor.