E-Commerce Microservices Engine

An open-source, head-less e-commerce backend built with an event-driven microservices architecture. Designed for high availability during flash sales, utilizing an event bus to handle inventory reservation, payment processing, and shipping logistics asynchronously.

The Problem

Traditional monolithic e-commerce backends often fail under flash-sale conditions due to database locks during synchronous checkout flows. The challenge was to build a completely asynchronous checkout pipeline that could queue thousands of orders per second without dropping a single transactional event.

Architecture & Tech Stack

This backend is completely headless, built entirely in Go for high concurrency and low memory footprint. It utilizes Apache Kafka as an event bus. When an order is placed, an 'OrderCreated' event is emitted. The Payment, Inventory, and Notification microservices consume this event at their own pace, utilizing the Saga pattern to handle distributed transactions and rollbacks.

Impact & Outcome

In simulated load testing using k6, the architecture successfully ingested 5,000 orders per second. Infrastructure costs were kept 40% lower compared to similar Node.js setups due to Go's efficient resource utilization inside Kubernetes clusters.