* Designed & developed metering and billing functionality for Amazon’s Buy with Prime service on third-party websites, enabling tracking of usage and billing merchants according to pricing agreements and frequency. Implemented support for various pricing models, including pay-as-you-go, subscriptions, volume-based tiered pricing, and bundling.* Designed the tax plugin for Amazon Buy with Prime, designed to compute applicable taxes for e-commerce orders on third-party websites. The plugin calculates taxes based on the shipping address and the merchant’s tax jurisdiction, ensuring compliance with regional tax regulations.• Designed identity & access management services for Amazon Buy with Prime, enabling secure authentication, authorization, and Prime status recognition. Designed to manage and protect access for shoppers, merchants, and third-party app developers on Amazon’s seller consoles and third-party e-commerce websites utilizing Prime fulfillment.* Designed and implemented a real-time analytical dashboard for enterprise book publishers, featuring interactive charts, advanced filtering, and actionable insights. Enabled the generation of approximately 2 million reports per month, both on-demand and scheduled, in various file formats.