Professional FastAPI Development FirmFastAPI Development
We build production-grade APIs with FastAPI in 12 weeks. Fixed price, senior engineers only.
IRPR is a professional FastAPI development firm. We build backend APIs, microservices, and real-time data pipelines using FastAPI, Pydantic for validation, SQLAlchemy for ORM, and async PostgreSQL. Every project runs on Docker with CI/CD on GitHub Actions.
A typical FastAPI project ships in 12-14 weeks with a fixed price between $80K and $250K. We handle compliance for HIPAA, PCI-DSS, SOC 2, and GDPR. You get full source code ownership and a deployed production environment.
We work with CTOs who need a scalable API for a new SaaS product, product managers launching a mobile app backend, and founders building an AI-powered platform that requires fast async endpoints. Each client gets a dedicated senior engineer from day one.
Types of software we ship.
REST API
Standard CRUD endpoints with FastAPI, automatic OpenAPI docs, and JWT auth. Ships with Pydantic schemas and Alembic migrations.
GraphQL API
GraphQL layer on top of FastAPI using Strawberry. Supports subscriptions, batched queries, and role-based field filtering.
Microservices Backend
Decoupled services with FastAPI, RabbitMQ for event bus, and Kubernetes orchestration. Each service has its own database and CI pipeline.
Real-time Data Pipeline
Async data ingestion using FastAPI streaming responses, WebSockets, and Redis pub/sub. Processes 10K+ events per second.
AI/ML API Wrapper
FastAPI endpoints that wrap OpenAI, Hugging Face, or custom PyTorch models. Includes rate limiting, caching, and prompt validation.
Ecommerce Backend
Order management, payment processing via Stripe, and inventory sync. FastAPI handles 1M+ requests per day with async workers.
SaaS Multi-tenant API
Tenant isolation with FastAPI middleware, per-tenant databases, and usage metering. Integrates with Stripe for billing.
Admin Dashboard API
FastAPI backend for admin panels with role-based access control, audit logging, and CSV/PDF export. Connects to any SQL or NoSQL database.
We build for every business type.
SaaS and tech companies
Healthcare
Fintech
Ecommerce and logistics
Media and content
Why choose a professional FastAPI development firm
Building a production FastAPI backend requires more than async endpoints.
FastAPI is fast by design, but production readiness demands async database sessions, connection pooling, proper error handling, and background task management. IRPR has shipped over 200 products using FastAPI since version 0.45. We use SQLAlchemy 2.0 with async sessions, Alembic for migrations, and Celery for background tasks.
We also handle deployment: Docker containers on AWS ECS or GCP Cloud Run, auto-scaling based on CPU or request count, and Sentry for error tracking. Every API ships with Prometheus metrics and Grafana dashboards. You get a system that handles 10,000 concurrent users from day one.
Generic dev shop vs. a professional FastAPI development firm
Not every agency can build a FastAPI backend that scales.
Many agencies use FastAPI as a buzzword but deliver synchronous code with global state. They skip async database drivers, ignore connection pool limits, and deploy without monitoring. You end up with an API that fails under load and has no observability.
IRPR treats FastAPI as a first-class framework. Every endpoint uses async def, every database call uses async SQLAlchemy, and every deployment includes health checks, structured logging, and auto-scaling policies. We also write integration tests that run in CI for every pull request.
- Uses sync def for all endpoints
- No async database sessions
- No connection pooling configuration
- No automated API documentation
- Deploys without monitoring
- No load testing before launch
- All endpoints use async def with proper await
- Async SQLAlchemy 2.0 with connection pooling
- Pydantic v2 validation with custom error messages
- Auto-generated OpenAPI docs with Swagger UI
- Prometheus metrics + Grafana dashboards
- Load testing with Locust before every release
How we build your FastAPI backend
Our process from idea to production in 12 weeks.
Every FastAPI project at IRPR follows a repeatable 4-phase process. We start with a 2-week Roadmap phase where we define the API contract, database schema, and deployment architecture. You get a fixed price and timeline before any code is written.
The Product phase runs 8-10 weeks of iterative development. We ship working endpoints every 2 weeks, deploy to a staging environment, and run automated tests. The Release phase includes load testing, security audit, and production deployment with monitoring.
What ships with every FastAPI project
Every deliverable includes documentation, tests, and infrastructure.
We don't just hand over code. Every FastAPI project includes a production-ready deployment, automated tests, and monitoring. You get everything you need to run the API without IRPR.
The codebase uses FastAPI best practices: dependency injection for database sessions, middleware for CORS and request logging, and background tasks with Celery. We also include a Postman collection for manual testing.
- Full source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions
- Docker Compose for local development
- Async SQLAlchemy models with Alembic migrations
- Pydantic v2 schemas with custom validation
- JWT authentication with refresh token rotation
- Prometheus metrics endpoint
- Sentry error tracking integration
- Locust load test scripts
- Postman collection with example requests
- Production deployment on AWS ECS or GCP Cloud Run
- 30-day warranty with Slack support
What we ship in this practice.
SaaS subscription management API
Built a multi-tenant FastAPI backend for a SaaS platform handling 50,000 active users. The API manages subscriptions, usage metering, and billing via Stripe. Reduced API latency by 40% compared to the previous Node.js backend. Tech stack: FastAPI, PostgreSQL, Redis, Stripe, Docker.
Healthcare patient data API
Developed a HIPAA-compliant FastAPI backend for a telemedicine startup. The API handles patient records, appointment scheduling, and video call metadata. Achieved SOC 2 Type II certification within 6 months. Tech stack: FastAPI, PostgreSQL, FHIR, AWS KMS, Sentry.
Fintech payment processing API
Created a PCI-DSS compliant FastAPI backend for a payment gateway. The API processes 1,000 transactions per second with idempotency keys and retry logic. Reduced chargeback disputes by 25% with real-time fraud scoring. Tech stack: FastAPI, PostgreSQL, Redis, Stripe, Plaid.
Ecommerce order management API
Built a FastAPI backend for an online retailer with 200,000 SKUs. The API handles order creation, inventory sync, and shipping label generation. Integrated with Shopify, Amazon MWS, and ShipStation. Reduced order processing time from 5 minutes to 30 seconds. Tech stack: FastAPI, PostgreSQL, Celery, RabbitMQ.
Logistics real-time tracking API
Developed a FastAPI WebSocket backend for a logistics company tracking 10,000 shipments daily. The API streams GPS coordinates, delivery status, and estimated arrival times. Improved on-time delivery rate to 98%. Tech stack: FastAPI, Redis, PostgreSQL, WebSockets, Google Maps API.
Media content distribution API
Built a FastAPI backend for a video streaming platform serving 500,000 users. The API manages content metadata, user preferences, and adaptive bitrate streaming. Reduced video buffering by 60% with CDN integration. Tech stack: FastAPI, PostgreSQL, Redis, AWS CloudFront, FFmpeg.
Why teams hire us.
Senior FastAPI engineers only
Every engineer on your project has 5+ years of Python experience and 3+ years with FastAPI. We don't outsource or use juniors. You get a dedicated senior engineer who writes all the 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. The price you see is the price you pay.
Production-grade from day one
We ship with async database sessions, connection pooling, structured logging, and monitoring. Every API is load-tested for 10,000 concurrent users before release. No rewrites needed.
Full code ownership
You own every line of code. No licenses, no recurring fees, no vendor lock-in. We hand over the GitHub repo, Docker images, and deployment scripts at the end of the project.
Compliance built in
We build HIPAA, PCI-DSS, SOC 2, and GDPR compliance into the architecture. Our team has completed compliance audits for 30+ clients. We handle encryption, access control, and audit logging.
12-week delivery guarantee
We ship a production-ready FastAPI backend in 12 weeks or less. 98% of our projects finish on time. If we are late, you don't pay for the extra weeks.
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.