---
type: entity
tags: [parking, stack, backend]
sources: [parking-system-architecture]
updated: 2026-06-14
---

# Fastify

The backend framework (Node.js). Chosen over Express: lighter, faster, with a clean
plugin/hook model. (See [[parking-system-architecture]] §2.)

- **Hardware drivers live as isolated Fastify plugins** emitting onto a shared internal event
  bus — this is the implementation vehicle for the [[device-adapter-pattern]].
- Also serves the [[react-vite-spa]] frontend.
- Hosts [[local-jwt-auth]] via `@fastify/jwt`; authorization is a simple `preHandler` role
  guard per route.

Part of the [[technology-stack]]. License: MIT.