Modern
Commerce
Platform
A full-stack e-commerce system engineered with real-world business logic, scalable backend services, and a seamless checkout experience.
Most e-commerce apps live in the shallow end.
Beginner e-commerce apps typically display products and call it done. They skip the hard parts — proper checkout validation, real payment workflows, protected routes, order consistency, and a backend architecture that doesn't collapse under real usage.
The gap between a demo project and a production-grade system is where most developers stop. LINEA was built to close that gap.
A complete commerce system, engineered end-to-end.
Auth System
JWT + Google OAuth for secure session management and protected user flows.
Cart & Wishlist
Full state management with persistent cart and user-specific wishlist functionality.
Checkout Logic
Multi-step checkout with shipping options, address validation, and total calculation.
Order Pipeline
Order creation tied directly to payment intent — no orphaned records.
Payment Handling
Mock Stripe intent + webhook confirmation for real-world payment lifecycle simulation.
Modular Backend
Controller → Service → Model architecture ensuring clean separation of concerns.
Built for clarity and scale.
Every decision had a reason.
Snapshot-based pricing
Order prices are captured at checkout time, not fetched dynamically — preventing inconsistencies if products change after an order is placed.
Protected API routes
Cart, wishlist, and orders are gated behind JWT middleware — ensuring user data is never exposed without authentication.
Service layer abstraction
All business logic lives in a service layer, making controllers thin and the system easy to test, extend, or replace.
Webhook-based confirmation
Payment status is confirmed via webhook events, not frontend callbacks — preventing race conditions and fake payments.
Fast where it matters.
Reduced redundant API calls through efficient client-side state management
Improved checkout reliability with strict server-side validation rules
Optimized product queries with indexing and filtering at the database layer
Modular API clients for clean separation and easier maintainability
"The goal wasn't to display products. It was to simulate the full commerce reality."
Real commerce is messy — users abandon checkouts, payments fail, orders need consistency guarantees. LINEA was built with that full complexity in mind. The focus was always on user journey, data consistency, and the backend architecture that holds it together silently.
Not just another portfolio demo. A system that could run in production.
What this project demonstrates.
From auth to payment confirmation — every layer designed and implemented.
Patterns and practices that transfer directly into real-world engineering roles.
Complete user journey simulation from browsing to order confirmation.