Design Online Shopping Platform (E-Commerce)

Functional Requirements–

• User should be able to search and find products based on product titles or names.

• User should be able to view the details of the product (Description, image, available quantity, review)

• User should be able to select the quantity and move the item to cart.

• User should be able to make the payment and do the checkout.

• User should be able to check the status of the order

• Manage purchase of items having limited stock.

Non-Functional Requirements—

• Scale: 10M MAU and 10 orders/sec

• CAP Theorem: Highly available with respect to searching and viewing the items, and highly consistent with respect to placing the order and payment.

Core Entities—

• User

• Product

• Cart

• Order

• Checkout

API–

1. // Search Product

1. GET: /products/search?q={seachTerm} → List <ProductId> list : Pagination

2. // Product Detail

1. GET:  /products/{productId}→ return the product details (json)

3. // Insert Data

1. POST: /cart {body: all product Id} → return cartId

4. // checkout and payment

1. POST: /checkout {body: all product Id with wty and price} → orderId

2. POST: /payment {body: orderId and payment details} → confirmation

5. // order Status

1. GET: /status/{orderId}

High-Level Design–