Best FastAPI Development DevelopersFastAPI
We ship production-ready FastAPI backends in 8-12 weeks. Fixed price, senior engineers, zero fluff.
IRPR builds high-performance FastAPI applications for APIs, microservices, and data pipelines. We use Pydantic for data validation, SQLAlchemy for async database access, and Docker for consistent deployments.
Every project ships with automated CI/CD, unit tests in pytest, and monitoring via Sentry. Typical timelines are 8 to 12 weeks, with fixed prices from $80K to $250K. We support HIPAA, PCI-DSS, and SOC 2 compliance when required.
Our clients are CTOs scaling API-first products, startup founders launching MVPs, enterprise teams migrating to asynchronous Python, and data engineering leads requiring high-throughput services.
Types of software we ship.
REST API backend
Stateless, versioned REST APIs using FastAPI, Pydantic, and async SQLAlchemy. Includes OpenAPI docs and JWT auth.
GraphQL API server
GraphQL endpoint with Strawberry or Ariadne, resolving via async FastAPI handlers. Supports query batching and subscriptions.
Real-time data streaming service
Event-driven streaming with FastAPI, Kafka or Redis Streams. Processes 10k+ events per second with low latency.
ML model inference API
FastAPI serving machine learning models via ONNX or TensorFlow. Includes request validation and prediction caching.
Third-party API integration hub
Unified gateway connecting Slack, Stripe, Salesforce, and more. Uses Celery for async retries and rate limiting.
Async microservice
Isolated, scalable microservice built with FastAPI, deployed via Docker Compose or Kubernetes. Service mesh ready.
WebSocket server
Real-time bidirectional communication using FastAPI WebSocket support. Suitable for chat, notifications, live dashboards.
API gateway / rate limiter
FastAPI-based gateway routing requests to multiple backends. Includes token bucket rate limiting and request logging.
We build for every business type.
SaaS companies
Data-driven startups
Enterprise platforms
Media and content
Developer tools
Why choose IRPR for FastAPI development
We've built over 200 production systems using FastAPI, with measurable results.
Every FastAPI project we deliver includes async endpoints, proper exception handling, and automated tests. Our engineers average 10+ years of Python experience and have shipped APIs handling 100k+ requests per second.
We use the same tools whether the project is a simple CRUD API or a real-time streaming service. That means faster development, fewer surprises, and predictable delivery.
The difference between generic Python shops and IRPR
Not all FastAPI developers deliver the same quality.
Generic shops often rely on sync frameworks like Flask or Django and treat FastAPI as just another router. They skip async patterns, miss performance tuning, and deliver code that fails under load.
IRPR uses only senior engineers who write async from day one. We enforce type hints, Pydantic validation, and strict test coverage. The result is code that scales and stays maintainable.
- No async expertise
- Hourly billing
- No test coverage
- No CI/CD pipeline
- No dedicated QA engineer
- Incomplete handoff
- Senior async Python specialists
- Fixed price per project
- Full test suite (pytest + pytest-asyncio)
- Automated CI/CD with GitHub Actions
- Dedicated QA engineer
- Complete source code, docs, and deployment
How we build your FastAPI backend in 12 weeks
Our proven process from idea to production.
We follow a four-phase approach that guarantees your FastAPI backend is built on time, within budget, and ready for production.
What ships with every FastAPI project
Everything you need to run in production.
We deliver more than just code. Every project includes a complete production-ready package.
- Source code in private GitHub repo
- FastAPI application with Pydantic schemas
- Async SQLAlchemy models with Alembic migrations
- Authentication (JWT or OAuth2 with refresh tokens)
- Automated test suite (pytest + httpx + pytest-asyncio)
- CI/CD pipeline (GitHub Actions or GitLab CI)
- Docker Compose setup for local development
- OpenAPI documentation (auto-generated, deployed with FastAPI)
- Sentry error tracking integrated
- Uptime monitoring (Pingdom or Grafana + Prometheus)
What we ship in this practice.
Real-time analytics API for adtech
Built a FastAPI event ingestion service handling 10k requests per second. Used Redis Streams for buffering and ClickHouse for analytics. Reduced query latency by 80%.
Patient data service for healthcare
HIPAA-compliant FastAPI backend for a telehealth startup. Managed 500k patient records with PostgreSQL and Alembic. Achieved 99.99% uptime with zero data leaks.
Payment gateway integration for fintech
PCI-DSS Level 1 compliant API integrating Stripe, PayPal, and Braintree. Used FastAPI, Celery, and Redis. Processed $5M in transactions in the first month.
Ecommerce product catalog API
FastAPI backend serving 1 million product SKUs with sub-100ms response times. Used Elasticsearch for full-text search and Redis for caching. Integrated with Shopify and Magento.
ML model inference service for logistics
FastAPI serving TensorFlow models for route optimization. Handled 500 concurrent requests with ONNX runtime. Achieved 99.9% uptime and reduced fuel costs by 15%.
Social media feed API for media
WebSocket-powered real-time feed using FastAPI and MongoDB. Supported 50k concurrent connections and delivered posts within 200ms.
Why teams hire us.
Fixed price contracts
Every FastAPI project gets a fixed quote after a 2-week Roadmap phase. No hourly billing, no surprise invoices, no scope creep charges.
Senior async Python specialists only
Our engineers average 10+ years of Python experience and have shipped FastAPI applications handling 100k+ req/s. We don't hire juniors or outsource.
Production-grade code from day one
We write typed, tested, and documented code from the first commit. Every project ships with 90%+ unit test coverage and automated CI/CD.
Full ownership of source code
You own 100% of the code, documentation, and infrastructure configurations. We never hold IP or require royalties.
Weekly demos and updates
You see working software every week. We share a live demo environment and a public Jira board so you track progress in real time.
Post-launch support included
Every project includes 30 days of free support after launch. We fix bugs, answer questions, and help with your first production release.
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.