ADHURI CART – Scalable E‑commerce Backend with Adonis.js

Overview

ADHURI CART is a scalable e‑commerce backend built on Adonis.js with JWT authentication, PostgreSQL, caching, and robust observability. The goal was to modernize a legacy monolith that caused slow checkouts and recurring security incidents.

Problem

• Monolithic codebase tightly coupled to views and business logic
• Slow checkout flows, p95 > 4.5s on peak traffic
• Authentication and session handling vulnerable to common OWASP issues
• No clear separation for inventory, orders, and payments

Solution

• Domain‑oriented modular architecture: auth, catalog, cart, orders, payments
• JWT for stateless auth, refresh tokens, and role‑based access control
• PostgreSQL with tuned indexes and connection pooling
• Caching for product and cart reads to reduce DB load
• Queues for order fulfillment and email notifications
• Observability: structured logging, metrics, health checks

Architecture

• API gateway exposes RESTful endpoints with versioning (e.g., /v1/orders)
• Service layer encapsulates domain rules, repositories handle persistence
• Validation at the edge; rate limiting and input sanitization

Outcomes

• Checkout time: −42% (p95 ~ 2.6s → 1.5s)
• Uptime: 99.9% sustained over 90 days
• Compliance: Aligned with OWASP best practices

Stack

• Adonis.js, TypeScript, PostgreSQL, Redis, JWT, REST

Key Learning

Modular boundaries and observability drove most of the reliability gains while JWT + RBAC simplified auth flows across services.