FastAPI Best Architecture

Enterprise Backend Architecture

Built on FastAPI with a frontend-backend split and a classic three-layer design. Supports Python 3.12+

Get Started ->Three-layer architecture?Why choose us?DeepWiki Docs

Enterprise-ready, out of the box

Three-layer core, plugin ecosystem, AI-first collaboration

Three-layer foundation

API → Service → CRUD/DAO layers with clear boundaries — productive in 30 minutes

Plugin ecosystem

AI, Auth, Storage, Notification — install and remove cleanly; private registries for enterprises

AI project context

fba skills + LLMs.txt help Claude Code, Cursor, Codex and more understand project conventions

Auth & permissions built-in

JWT, RBAC, data permissions, OAuth 2.0 and other enterprise essentials included

Cache, queue & ops

Redis, Celery, end-to-end logging, and timezone support when you need them

One-click container deploy

Docker Compose ready with a production-ready PostgreSQL setup

Open source, community driven

The numbers speak for developers' real choices

What the community says

More teams are building the next generation of backends with fba

fba is not about “how to write an endpoint”, but the permission, logging, layering, deployment, and maintainability problems that appear once a team really starts collaborating.

Three-layer architecture + plugins give my focus back to the business. With AI, the pace goes all the way up.

The best part is the clear boundaries: API for protocol, Service for business, CRUD/DAO for data access. New maintainers can find their place quickly.

The plugin marketplace is the right direction: install what you need, remove what you don’t, without sticking to the main project.

With Trace IDs, troubleshooting takes far fewer detours.

I care more about delivery cost. With Docker Compose, monitoring, and logging already in place, promoting from test to production feels much safer.

This is not just writing code — it feels like a dimension-reduction strike. Elegant architecture plus a powerful plugin ecosystem, amplified by AI, is a real productivity boost for backend work.

RBAC, JWT, and caching are already there — new projects no longer need half a day of scaffolding.

The further a project goes, the more you feel the value of unified layering. Code is not placed by personal habit, and reviews spend far less time debating “where should this go?”

Letting AI write the code and then tightening it to project conventions saves more time than rigid templates.

The architecture is not heavy, but the engineering constraints you need are there. For mid/back-office systems and internal platforms, the balance is just right.

The directory structure is obvious at a glance — much less explaining needed.

PostgreSQL is deeply supported, and with plugin-based extension the main project does not have to get messier as business grows.

Deployment, troubleshooting, and handovers are all easier than with a hastily assembled FastAPI project.

Many scaffolds only get you “running”. fba feels more like the common pre-production concerns already wired together. You do not have to use everything, but it is there when you need it.