Nanda Kresnatara

Built prototype sales automation system integrating WhatsApp Business API, Midtrans payment gateway, and conversational AI using React/Hono and N8N workflow orchestration.

Developed RAG-based chatbot for product inquiries using Supabase vector embeddings and Gemini, allowing customers to browse and initiate checkout through WhatsApp messaging.

Created admin and customer dashboards for order management, implementing webhook-based synchronization to coordinate state across payment gateway, messaging API, and database services.

Gained hands-on experience with production security patterns including webhook signature verification (HMAC-SHA512), rate-limited authentication, and idempotent transaction handling.