Professional FastAPI Development ServicesFastAPI Development
We build production-grade FastAPI backends for SaaS, fintech, and AI apps. Senior Python engineers, fixed price, 8-12 week delivery.
IRPR builds professional FastAPI development services for companies that need high-performance, async-first APIs. We use Python 3.12, Pydantic v2 for validation, SQLAlchemy async for database access, and deploy on AWS ECS or Kubernetes with auto-scaling.
Every FastAPI project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance for HIPAA, PCI-DSS, and SOC 2. You get production-ready code, CI/CD pipelines, and full API documentation via OpenAPI.
Startups building SaaS MVPs hire us to ship a working API in 8 weeks. Fintech companies need PCI-compliant payment backends. Healthcare platforms require HIPAA-compliant FastAPI services. Enterprise teams want to migrate legacy Flask or Django apps to FastAPI for better performance.
Types of software we ship.
FastAPI REST API development
Build synchronous and async REST endpoints with Pydantic validation, JWT auth, and PostgreSQL. Deploy on AWS with auto-scaling.
FastAPI microservices
Create decoupled, event-driven microservices using FastAPI with RabbitMQ or Kafka, each deployable independently.
FastAPI GraphQL API
Implement GraphQL endpoints with Strawberry or Ariadne on FastAPI, supporting real-time subscriptions and complex queries.
FastAPI WebSocket server
Build real-time WebSocket servers for chat, notifications, or live data streams, handling thousands of concurrent connections.
FastAPI admin panel
Generate a full admin dashboard with FastAPI and SQLAdmin, including user management, CRUD operations, and audit logs.
FastAPI file upload service
Build secure file upload APIs with chunked uploads, virus scanning, and S3 storage integration, handling up to 10GB files.
FastAPI OAuth2 server
Implement a custom OAuth2 provider with FastAPI supporting social login (Google, GitHub) and enterprise SSO (SAML, LDAP).
FastAPI data pipeline
Create ETL and data processing pipelines using FastAPI with Celery for async tasks, Redis for caching, and PostgreSQL for storage.
We build for every business type.
SaaS and startups
fintech and payments
healthcare and biotech
ecommerce and logistics
AI and data platforms
Why choose professional FastAPI development services
FastAPI is the fastest Python web framework for building APIs. Here is what IRPR delivers with every project.
FastAPI handles up to 50,000 requests per second on a single server with async workers. It uses Python type hints for automatic request validation and generates OpenAPI docs without extra code. This means your frontend team can start integrating immediately.
IRPR has shipped 200+ FastAPI projects across fintech, healthcare, and SaaS. Our senior engineers write testable code with 90%+ coverage, use async SQLAlchemy for database access, and deploy on AWS with auto-scaling. Every project includes a full CI/CD pipeline on GitHub Actions.
Generic dev shop vs professional FastAPI development services
Not all agencies build FastAPI the right way. Here is how IRPR differs from generic Python shops.
Generic shops often use synchronous Flask code, skip async patterns, and deliver slow APIs with poor error handling. They charge hourly and scope creep is common.
IRPR builds FastAPI from day one with async endpoints, Pydantic validation, and proper dependency injection. We write tests before code, use Alembic for database migrations, and deploy with Docker and CI/CD. Our fixed price means no surprises.
- Uses synchronous Flask or Django
- No async endpoints
- Manual request validation
- No automated tests
- Hourly billing with scope creep
- No CI/CD pipeline
- Builds with FastAPI async from day one
- Async endpoints with SQLAlchemy async
- Automatic validation with Pydantic v2
- 90%+ test coverage before delivery
- Fixed price with no scope creep
- Full CI/CD on GitHub Actions
Our FastAPI development process
We follow a four-phase process to deliver production-ready FastAPIs in 8-12 weeks.
Every project starts with a 2-week Roadmap phase where we define endpoints, data models, and deployment architecture. You get a fixed price quote before any code is written.
Then we build the API in 6-10 weeks, writing tests alongside code. We deploy to staging within 3 weeks so you can test endpoints. Final delivery includes source code, CI/CD, and full OpenAPI documentation.
What ships with every FastAPI project
Every professional FastAPI development project includes these deliverables by default.
You get a production-ready FastAPI backend with full documentation and deployment pipelines. No hidden extras.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- Docker compose and Dockerfile
- OpenAPI 3.1 documentation
- Pydantic v2 request/response models
- JWT authentication with refresh tokens
- Alembic database migrations
- Sentry error tracking
- AWS deployment with auto-scaling
- 30-day post-release support
What we ship in this practice.
SaaS subscription API
Built a multi-tenant FastAPI backend for a B2B SaaS platform. Handles 10,000 requests/sec with Stripe subscription management. Reduced API response time from 400ms to 40ms. Tech stack: FastAPI, PostgreSQL, Redis, Stripe, AWS ECS.
HIPAA-compliant patient portal
Developed a FastAPI backend for a telemedicine startup with PHI encryption, audit logs, and FHIR integration. Achieved HIPAA compliance in 8 weeks. Tech stack: FastAPI, PostgreSQL, AWS KMS, FHIR R4.
Real-time trading platform
Built a WebSocket-based trading API with FastAPI handling 5,000 concurrent connections. Processes 1,000 trades/sec with sub-10ms latency. Tech stack: FastAPI, Redis, Kafka, PostgreSQL, AWS EC2.
Ecommerce product catalog API
Created a FastAPI backend for a fashion retailer with full-text search, inventory sync, and Stripe payments. Handles 50,000 SKUs with 200ms search response. Tech stack: FastAPI, Elasticsearch, PostgreSQL, Stripe.
ML model serving API
Built a FastAPI service to serve a TensorFlow recommendation model with 100ms inference time. Handles 10,000 requests/min with auto-scaling. Tech stack: FastAPI, TensorFlow, Redis, AWS SageMaker.
Logistics tracking API
Developed a FastAPI backend for a freight company with real-time GPS tracking and route optimization. Processes 10,000 location updates/min. Tech stack: FastAPI, PostgreSQL, Redis, MQTT, AWS IoT.
Why teams hire us.
Senior engineers only
Every IRPR engineer has 8+ years of Python experience and has shipped at least 5 FastAPI projects. No juniors, no offshore teams. You work directly with the person writing your code.
Fixed price, not hourly
Every FastAPI project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost before we write a line of code.
8-12 week delivery
We ship production-ready FastAPI backends in 8-12 weeks. Our average is 10 weeks. You get a working API in staging by week 5. No 6-month projects.
Compliance built in
We build HIPAA-compliant FastAPI backends with PHI encryption and audit logs. PCI-DSS compliant payment APIs with tokenization. SOC 2 ready logging and access controls. All included in the fixed price.
Full code ownership
You own 100% of the source code, documentation, and deployment scripts. No license fees, no vendor lock-in. You can deploy anywhere with the Docker setup we provide.
200+ products shipped
IRPR has delivered 200+ software products across 50+ countries. 98% on-time delivery. Every FastAPI project benefits from patterns we have refined across dozens of production APIs.
Idea → Roadmap → Product → Release.
Every engagement runs through the same four-stage pipeline. Predictable by design.
Questions clients ask first.
Related services and industries.
Ready to build? Let's talk.
30-minute discovery call. No deck. We'll tell you honestly what it takes, how long, and how much.