COINKY — Digital Banking System

JavaScript

HTML

CSS

A web banking application in PHP that manages multiple financial accounts (Main, Savings, Reserve), with inter-account transfers, balance evolution charts, transaction history, and a separate admin panel. Built on a hand-rolled MVC architecture without external frameworks.

A complete digital banking experience in PHP, built end-to-end on top of a hand-rolled MVC core (no Laravel, no Symfony — just routing, controllers, models, and views I wrote myself).

What it does

Three account types per customer: a Main account for daily transactions, Savings for long-term goals, and a Reserve for emergencies.
Inter-account transfers with intuitive sliders and balance validation in real time.
Transaction history per account, with pagination and filtering.
Balance evolution charts powered by Chart.js — see your account trends over time.
Currency converter built in for quick cross-currency lookups.
Profile management: edit personal data, change password, upload a profile photo.

Admin panel

A separate administrative surface (/admin/) for:

Listing all registered customers.
Activating / deactivating accounts.
Monitoring system-wide transactions.

Architecture

MVC built from scratch in PHP — controllers, models, views, layouts, and a custom routing system (rotas.php / rotas_admin.php). No external framework.
MySQL persistence with prepared statements throughout (no string-built SQL).
Composer for the autoloader and a small set of helpers.
password_hash() for credentials; sessions guard every authenticated page; permission checks gate the admin area.

Frontend stack

Chart.js for the balance trend lines.
Circle Progress for the dashboard’s circular balance visualization.
FontAwesome for iconography.
jQuery for DOM and AJAX glue.
Modern responsive CSS — works on phones and desktops.