FastAPI Development Services
- 12+ FastAPI services
- 20+ Python engineers
- < 50ms avg response time
What is FastAPI development?
What we build with FastAPI Development
AI and ML model serving
Async inference endpoints for PyTorch, TensorFlow and Hugging Face models with batched prediction, streaming responses, model versioning and GPU resource management.
High-throughput microservices
Async API services handling 10K+ concurrent requests with sub-10ms latency, gRPC interop, message queue consumers (Kafka, RabbitMQ) and distributed tracing.
Real-time data APIs
WebSocket servers for live data feeds, Server-Sent Events for dashboard updates, streaming API responses and real-time notification backends with async I/O.
Data platform backends
API layers for data lakes, feature stores, analytics platforms and BI tools with async database access, query caching and pagination for large datasets.
FinTech API services
Payment processing APIs, KYC verification endpoints, transaction monitoring services and regulatory reporting APIs with strict input validation via Pydantic schemas.
Developer API products
Public-facing APIs with auto-generated documentation, API key management, rate limiting, usage metering and SDK generation from OpenAPI specifications.
FastAPI vs Django REST Framework for Python APIs
| Factor | FastAPI | Django REST Framework |
|---|---|---|
| Performance | Async, 3-5x faster throughput for I/O workloads | Synchronous by default, moderate throughput |
| Documentation | Auto-generated Swagger UI and ReDoc from code | Manual or drf-spectacular for OpenAPI |
| Validation | Pydantic v2: fast, type-safe, auto-coercion | DRF serializers: verbose but powerful |
| ORM | No built-in ORM - use SQLAlchemy or Tortoise | Django ORM: mature, migrations, admin |
| Admin panel | No admin panel included | Django admin: auto-generated, production-ready |
| Learning curve | Gentle: Python type hints drive everything | Moderate: Django conventions + DRF serializers |
| Ecosystem | Growing fast, 75K+ GitHub stars | Mature: 28K+ stars, 11K+ Django packages |
Pharos Production recommends FastAPI for new API-first projects, ML serving endpoints, async-heavy workloads and microservices where throughput matters. Django REST Framework suits projects that need Django ORM, admin panel, built-in auth and the mature Django ecosystem.
Limitations: FastAPI lacks built-in ORM, admin panel, migrations, form handling and template rendering - you must assemble these from third-party packages. The async ecosystem in Python is still maturing - some database drivers and libraries remain synchronous. For full-stack web applications with admin UIs and server-rendered pages, Django is more productive. FastAPI projects require more architectural decisions upfront compared to Django batteries-included approach.
FastAPI Development Benchmark 2026
Proprietary research based on 15+ FastAPI projects delivered by Pharos Production since 2021. Dataset covers ML serving APIs, FinTech microservices, real-time data backends and developer API products. Methodology (Pharos Verified Delivery): aggregated delivery metrics with production APM monitoring and load testing data. Full report available on request.
FastAPI Development projects we delivered
- FastAPI is the fastest-growing Python web framework with 75K+ GitHub stars and adoption by Microsoft, Uber, Netflix and Explosion AI.
- Pydantic v2 (Rust-powered) validates request data 5-50x faster than Pydantic v1, with automatic JSON Schema generation for API documentation.
- FastAPI async performance matches Node.js for I/O-bound workloads while keeping Python ecosystem access for ML, data science and automation.
- Pharos Production has delivered 15+ FastAPI projects across AI backends, FinTech APIs and high-throughput microservices since 2021.
- A FastAPI microservices MVP starts from $20,000-$45,000 and takes 6-10 weeks depending on API complexity and integration requirements.
- FastAPI provides no ORM, admin panel, migrations or template engine - every project requires assembling 5-10 third-party packages (SQLAlchemy, Alembic, authlib, etc.) before you can write business logic, adding 2-3 weeks of boilerplate setup.
- Python async ecosystem is incomplete - many popular libraries (some database drivers, file I/O, third-party SDKs) remain synchronous, forcing developers to use run_in_executor() wrappers that negate async performance benefits.
- FastAPI dependency injection is runtime-resolved, not compile-time checked - circular dependencies, missing providers and type mismatches only surface when the endpoint is called, making large applications harder to refactor safely.
- Auto-generated API documentation from Pydantic models can produce misleading schemas when models use complex inheritance, unions or generic types - developers must manually verify that Swagger UI accurately represents the actual API behavior.
Frequently asked questions
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FastAPI is 3-5x faster for I/O-bound workloads, generates API documentation automatically from code and validates data with Pydantic type hints. Choose FastAPI for API-first microservices.
Choose Django when you need ORM, admin panel and full-stack features.
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Yes. Microsoft, Uber, Netflix and Explosion AI use FastAPI in production.
The framework is stable, well-documented and backed by a growing ecosystem. We have run FastAPI services handling 50K+ requests per minute for over 3 years.
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FastAPI works with SQLAlchemy (most popular), Tortoise ORM or raw async drivers (asyncpg for PostgreSQL). We use SQLAlchemy 2.0 with async sessions for new projects, paired with Alembic for database migrations.
This gives you ORM power without Django coupling.
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Yes. FastAPI async architecture is ideal for ML serving - it handles concurrent inference requests without blocking while models process on GPU.
We combine FastAPI with PyTorch, TensorFlow Serving or Triton for production ML endpoints with batched prediction and model versioning.
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API microservice MVPs start from $20,000-$45,000. AI/ML serving platforms range from $40,000 to $120,000.
Full data platform backends cost $60,000 to $180,000+. We provide detailed estimates within 48 hours.
Reviews
Independent reviews from Clutch, GoodFirms and Google - verified client feedback on our software projects
Based on 11 verified client reviews
Pharos Production Inc. helped the client achieve over 10,000 downloads in the first three months and a 35% increase in repeat orders. Moreover, the team provided excellent project management, met all deadlines, and responded quickly to all requests for changes. Overall, it was a smooth experience.
Pharos Production Inc.'s efforts resulted in a 40% increase in transaction processing efficiency, a 30% improvement in blockchain integration speeds, and the mitigation of all critical security risks. The team was transparent, proactive, and technically proficient.
Choose your cooperation model
Core software architecture, initial UI/UX, working prototype in 3 months
Software architecture, UI/UX, customized software development, manual and automated testing, cloud deployment
Comprehensive software architecture and documentation, UI/UX design layouts, UI kit, clickable prototypes, cloud deployment, continuous integration, as well as automated monitoring and notifications.
Prices vary based on project scope, complexity, timeline and requirements. Contact us for a personalized estimate.
An approach to the development cycle
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Team Assembly
Our company starts and assembles an entire project specialists with the perfect blend of skills and experience to start the work.
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MVP
We’ll design, build, and launch your MVP, ensuring it meets the core requirements of your software solution.
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Production
We’ll create a complete software solution that is custom-made to meet your exact specifications.
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Ongoing
Continuous Support
Our company will be right there with you, keeping your software solution running smoothly, fixing issues, and rolling out updates.
Partnerships & Awards
Recognized on Clutch, GoodFirms and The Manifest for software engineering excellence
Build with FastAPI Development
90+ engineers ready to deliver your FastAPI Development project on time and within budget
What happens next?
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Contact us
Contact us today to discuss your project. We’re ready to review your request promptly and guide you on the best next steps for collaboration
Same day -
NDA
We’re committed to keeping your information confidential, so we’ll sign a Non-Disclosure Agreement
1 day -
Plan the Goals
After we chat about your goals and needs, we’ll craft a comprehensive proposal detailing the project scope, team, timeline and budget
3-5 days -
Finalize the Details
Let’s connect on Google Meet to go through the proposal and confirm all the details together!
1-2 days -
Sign the Contract
As soon as the contract is signed, our dedicated team will jump into action on your project!
Same day
Our offices
Headquarters in Las Vegas, Nevada. Engineering office in Kyiv, Ukraine.