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Mobile-first GST-compliant billing and inventory app for Indian SMBs, built with cross-platform support and real-time POS features.
Billing Fast (formerly Kirana Fast) is a full-featured mobile-first billing and inventory app tailored for Indian small and medium businesses. I worked as a Flutter developer early in the company's journey, helping develop and optimize key modules like the billing interface, inventory tracking, and GST invoice logic. The product was built to support kirana stores, clothing retailers, and wholesalers, offering offline-first capabilities and shareable bills via WhatsApp. My role involved rapid prototyping, refining UI/UX for small devices, and integrating barcode scanning and HSN code support.