Amazon Clone

Built to work through a complete commerce flow end to end — catalogue, cart, authentication, checkout and order persistence — against a real backend rather than mocked data, where the interesting failures actually occur.

The genuinely hard part of commerce is not the product grid. It is cart state surviving authentication: a shopper adds items, then signs in, and the cart they built anonymously has to merge with whatever is already on their account rather than replacing it or being discarded.

Built the React front end and the Firebase integration covering authentication, data persistence and the cart lifecycle.

Firebase for auth and persistence, which deliberately removes backend infrastructure from scope and leaves the commerce logic itself as the actual work — cart reconciliation across sign-in, auth state consistent across routes, and checkout that cannot double-submit.

Auth state is held once and read everywhere rather than re-derived per route, because the common bug in this shape of app is two components disagreeing about whether the user is signed in.

Shipped as a working storefront with catalogue, cart, authentication and checkout. The hosted demo currently returns HTTP 451 and needs rehosting.