#Backend Architecture

5 articles tagged with Backend Architecture

Building a Multi-Currency Pricing System That Doesn't Break

The e-commerce & SaaS multi-currency system design blueprint. Floating exchange rates, fixed localized tier pricing, integer cent precision, and FX rounding error prevention.

8/1/202625 min read

Building a Notification System: Push, Email, SMS Fallback Chains

The multi-channel notification engine architecture. How to build a reliable fallback pipeline across Web Push, Mobile APNs/FCM, Email (Resend/SES), and SMS (Twilio).

8/1/202625 min read

Building a Rules Engine Instead of Hardcoding Business Logic

Escape the if-else nightmare: how to design a declarative, runtime-configurable rules engine using the ECA (Event-Condition-Action) pattern in TypeScript.

8/1/202625 min read

Migrating a Node.js API to FastAPI: A Real Cost/Benefit Breakdown

I've now run this migration twice for clients adding heavy AI features to an existing Node backend. Here's the honest ledger — what it actually cost in time, what broke, and when it wasn't worth it.

7/8/202611 min read

Why FastAPI Became the Default Backend for AI Products in 2026

Node.js won the last decade of API backends. For AI products, the calculus flipped. Here's the actual reasoning — not hype — behind why most AI teams reach for FastAPI first.

6/26/20269 min read