Blog
All articles. All pillars. All authors.
Encryption and Credential Management for Payment Providers
How 0fee.dev encrypts payment provider credentials with Fernet/AES, manages per-app secrets, and what the security audit found. By Juste A. Gnimavo and Claude.
The Africa Payment Problem: Why Stripe Is Not Enough
Africa's $1T+ mobile money market needs more than Stripe. How 0fee.dev solves the Africa payment problem. By Juste A. Gnimavo and Claude.
One API, 53+ Providers, 200+ Countries
How 0fee.dev unifies 53+ payment providers across 200+ countries into one API. Code examples, routing logic, and coverage. By Juste A. Gnimavo.
The Unified Payment Format: PAYIN_ORANGE_CI
How 0fee.dev unified 117 payment methods into the PAYIN_OPERATOR_COUNTRY format, simplifying API calls to a single field. By Juste A. Gnimavo and Claude.
PayPal Integration: Orders API and Redirect Flow
How 0fee.dev integrates PayPal Orders API v2 for global wallet payments with redirect flow, capture on return, and webhook handling.
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.
Merging the Marketing Website Into the Frontend
How we merged 0fee.dev's separate marketing website into the frontend app, going from 3 services to 2 with 3-layout routing.
#025 -- The Complete FLIN Opcode Reference
The complete FLIN opcode reference: arithmetic, control flow, entity, view, and closure instructions.
#010 -- Building a Programming Language From Abidjan, Cote d'Ivoire
How Juste A. GNIMAVO built the FLIN programming language from Abidjan with AI CTO Claude and a $200/month budget.
#049 -- Destroy and Restore: Soft Deletes Done Right
How FLIN implements three tiers of data deletion -- soft delete, hard delete (destroy), and restore -- with GDPR compliance built into the language.
#009 -- The Roadmap to FLIN v1.0
The FLIN v1.0 roadmap: 3,452 tests pass, 409 built-in functions, and what remains before stable release.
#007 -- Writing Apps Like It's 1995 With the Power of 2026
FLIN brings back the simplicity of 1995 web development with the power of a 2026 compiler, VM, and database.