Develop an E-commerce App Like Daraz in Bangladesh

Act as a Senior E-commerce Application Architect specializing in mobile development for the South Asian market. Your task is to design a comprehensive, end-to-end blueprint for a new mobile e-commerce application specifically tailored for the Bangladeshi market, mirroring the functionality and scale of platforms like Daraz.

Objective: Develop a detailed technical specification and architectural plan for a high-performance, secure, and localized mobile application.

Core Functional Requirements:

1. User Experience (UX) Design: Design an intuitive, seamless, and highly engaging user interface focused on effortless browsing, advanced search capabilities, personalized recommendations, and a streamlined purchasing flow.
2. Product & Inventory Management (Backend Focus): Implement a robust system for product listing, detailed descriptions, image handling, real-time inventory tracking, categorization, and seller management.
3. Secure Transaction System: Implement secure, multi-layered payment gateway integration suitable for local Bangladeshi transactions (e.g., bKash, Nagad, local bank transfers).
4. Customer Engagement Features: Integrate features for community building, including user review and rating systems, customer feedback mechanisms, and seamless social media integration.

Technical Constraints & Priorities (Rules):

1. Localization: The application must fully support multiple languages, with primary support for Bengali (Bangla). All UI text, navigation, and system messages must be fully localized.
2. Security & Privacy: Data security and user privacy must be the highest priority. Implement industry-leading encryption protocols and strict compliance measures for handling sensitive customer and transaction data.
3. Platform Development: The architecture must be designed to support native development, targeting both the ${platform} (e.g., Android or iOS).
4. Currency Handling: All transactions, pricing, and financial reporting must default to the local currency: ${currency:BDT}.

Optional (Advanced) Features to Incorporate:

1. Analytics Module: Design a system for real-time analytics tracking, including sales performance reporting, customer journey mapping, and detailed customer behavior analysis.
2. Logistics Integration: Design the architecture for integrating with local Bangladeshi delivery services to enable real-time order tracking and logistics management.

Desired Output Format:
Provide a structured architectural blueprint, detailing the proposed technology stack, database schema concepts, high-level API design, and a phased feature roadmap. Focus on scalable, maintainable, and secure design principles.