Blog
All articles. All pillars. All authors.
The Checkout Widget: 21KB IIFE That Handles Everything
How we built 0fee.dev's 21KB checkout widget as a Vite IIFE library build with country selection, OTP support, and phone input.
The Developer Console: Tabs, Status Checker, and Widget Preview
How we built the 0fee.dev Developer Console with interactive status checker, widget preview, and downloadable templates. By Juste A. Gnimavo and Claude.
The Intelligent Payment Routing Engine
How 0fee.dev routes payments across 117 methods and 53+ providers using priority-based selection with automatic fallback. By Juste A. Gnimavo and Claude.
Building a SolidJS Dashboard From Scratch
How we built 0fee.dev's SolidJS dashboard with stores, component architecture, real API integration, and 3-layout routing system.
Building a Payment Platform From Abidjan, Ivory Coast
How we built 0fee.dev from Abidjan with one CEO and one AI CTO in 86 sessions over 80 days. Zero human engineers. By Juste A. Gnimavo.
Wallet and Add Funds Flow
How 0fee.dev's wallet system works: credits, add-funds flow, country-based filtering, coupons, and balance management. By Juste A. Gnimavo and Claude.
The Billing Suspension System
How 0fee.dev handles unpaid invoices: cron-based billing, grace periods, 402 responses, auto-reactivation. By Juste A. Gnimavo and Claude.
The Simplified 3-Field API: Amount, Currency, Reference
How 0fee.dev reduced its payment API to 3 required fields: amount, currency, and reference. Hosted checkout as the default. By Juste A. Gnimavo and Claude.
The 0.99% Fee Model: Zero Monthly Fees
How 0fee.dev pricing works: 0.99% per transaction, zero subscriptions, monthly invoicing, multi-currency conversion. By Juste A. Gnimavo and Claude.
42 Files, 7,900 Lines, 45 Minutes: The First Session
How we built the entire 0fee.dev backend in 45 minutes: 42 files, 7,900 lines, 5 payment providers, 30+ API endpoints. By Juste A. Gnimavo and Claude.
Internationalization: 15 Backend Languages, 5 Frontend
How 0fee.dev implements 15 backend languages and 5 frontend languages with SolidJS Context API, RTL Arabic, and 1,350+ keys.
Dark Mode Across 19 Dashboard Pages
How we systematically implemented dark mode across 19 dashboard pages in 0fee.dev with consistent patterns and intentional exclusions.