What does a FastAPI developer do?+
A FastAPI developer builds high-performance Python REST APIs and microservices using the FastAPI framework. This includes designing API endpoints, implementing authentication (JWT, OAuth2), integrating databases (PostgreSQL, Redis), setting up background tasks with Celery, writing tests, and deploying to cloud platforms like AWS. FastAPI developers specialise in async Python, which enables significantly higher throughput than traditional frameworks like Flask or Django REST.
How much does it cost to hire a FastAPI developer?+
FastAPI developer rates in 2026 range from $25–$50/hr for experienced freelancers in Asia and Eastern Europe, $80–$150/hr for US-based contractors, and $120–$200/hr for agency rates. At Navspace, FastAPI development starts at $50/hr. A typical REST API with 10–15 endpoints, JWT auth, and PostgreSQL integration takes 2–4 weeks ($4,000–$8,000). A full SaaS backend with microservices, background workers, and AWS deployment is typically $8,000–$20,000.
Why hire a FastAPI developer instead of a Django developer?+
FastAPI is the right choice when you need maximum performance, native async support, or are building an API-first backend (mobile app, SPA, or microservice). FastAPI handles 10,000+ req/s on standard hardware — roughly 3x the throughput of Django REST Framework under load. Django is better when you need a built-in admin panel, a batteries-included ORM, or an established plugin ecosystem. Many production systems use FastAPI for the API layer and Django for the admin/CMS layer.
How long does it take to build a FastAPI backend?+
A simple FastAPI service with 5–10 endpoints takes 1–2 weeks including tests and basic deployment. A production SaaS API with JWT auth, PostgreSQL, Redis caching, Celery workers, and CI/CD on AWS typically takes 3–6 weeks. Complex multi-service architectures take 2–4 months. At Navspace, the first functional API endpoints are typically running within 3–5 business days of project start.
What is your FastAPI tech stack?+
The standard Navspace FastAPI stack: FastAPI + Pydantic v2 for the API layer, SQLAlchemy 2.0 + asyncpg for async PostgreSQL, Alembic for migrations, Redis + Celery for background tasks, pytest + httpx for testing (>85% coverage), Docker + GitHub Actions for CI/CD, and AWS ECS or Lambda for deployment. Authentication uses JWT with refresh token rotation or Auth0 for enterprise SSO.
Can you integrate FastAPI with my existing frontend or mobile app?+
Yes. FastAPI automatically generates OpenAPI (Swagger) documentation, which makes integration with any frontend or mobile app straightforward. The API can be connected to React, Vue, Next.js, React Native, Flutter, or any HTTP client. CORS is configured for specific origins in production. For real-time features, FastAPI supports WebSockets natively, enabling live data updates without polling.