Blog
All articles. All pillars. All authors.
The Feature Request Module: Developer Feedback Loop
How we built the 0fee.dev feature request system with 4 tables, 20 API routes, upvoting, and priority levels. By Juste A. Gnimavo.
The AI Developer Assistant: Claude Haiku Integration
How we designed an AI developer assistant for 0fee.dev using Claude Haiku, custom tools, and streaming responses. By Juste A. Gnimavo and Claude.
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 Admin Panel MVP: UUID-Based Routes and Role Hierarchy
How we built the 0fee.dev admin panel with UUID-based routes, JWT auth, and a 4-tier role hierarchy. By Juste A. Gnimavo and Claude.
Financial Compliance: OHADA 10-Year Retention Rules
How OHADA's 10-year document retention rules shaped 0fee.dev's deletion policy and archive system. By Juste A. Gnimavo and Claude.
Hosted Checkout Pages: The Redirect Flow
How 0fee.dev built server-rendered hosted checkout pages with Jinja2, multi-language support, dark mode, and sandbox mode.
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.
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.
The Provider Adapter Pattern: One Interface for Every Payment System
How 0fee.dev uses the adapter pattern to unify Stripe, PayPal, Hub2, and PawaPay behind one Python interface. 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.
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.