Building a Full-Stack App with Next.js and FastAPI

Combining Next.js for the frontend and FastAPI for the backend creates a powerful, modern full-stack architecture. Here's how to get started.

Why This Stack?

• Next.js: Server-side rendering, static generation, and excellent developer experience


• FastAPI: High performance, automatic API documentation, and Python's rich ecosystem


• Together: The best of both worlds — React's component model with Python's data processing power

Setting Up the Backend

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
app = FastAPI()
app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:3000"],
    allow_methods=["*"],
)
@app.get("/api/hello")
async def hello():
    return {"message": "Hello from FastAPI!"}

Deployment

Deploy the frontend to Vercel and the backend to Railway for a production-ready setup.

This stack scales beautifully and gives you the flexibility to build anything from a simple blog to a complex SaaS application.