Blog
All articles. All pillars. All authors.
Payment Links: Shareable URLs for Any Payment
How 0fee.dev payment links work: shareable URLs, customer data collection, currency conversion, and invoice generation. By Juste A. Gnimavo and Claude.
Session 3: Marketing Website, 5 New SDKs, and Docker
How we built the 0fee.dev marketing website, 5 SDKs (Go, Ruby, PHP, Java, C#), and Docker stack in one session. 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.
UI Polish: From Functional to Premium
How 0fee.dev evolved from functional to premium with SVG icons, custom Select components, card styling, and syntax highlighting.
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.
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.
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.
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.
Currency Conversion Across 25+ Currencies
How 0fee.dev handles currency conversion across 25+ currencies with free APIs, caching, and locale detection. By Juste A. Gnimavo and Claude.
Invoice System and PDF Generation With WeasyPrint
How 0fee.dev generates professional invoices with WeasyPrint, merchant branding, search/filter, and email delivery. By Juste A. Gnimavo and Claude.
OAuth Authentication: Google, GitHub, Microsoft, and Apple
How we implemented OAuth with Google, GitHub, Microsoft, and Apple on 0fee.dev, including Apple's popup flow. By Juste A. Gnimavo.
PawaPay: Pan-African Mobile Money for 21+ Countries
How 0fee.dev integrates PawaPay's hosted payment page for mobile money across 21+ African countries with correspondent codes.