Expert FastAPI Development DevelopersFastAPI Development
We build production-ready APIs with Python FastAPI. Senior engineers ship your backend in 8-12 weeks.
IRPR builds high-performance APIs with Python FastAPI, leveraging async endpoints and Pydantic for validation. We use FastAPI's dependency injection and OpenAPI auto-documentation for clean, scalable backends that serve as the foundation for your product.
Every project ships in 8-12 weeks with a fixed price typically between $80K-$250K. Our APIs achieve 99.9% uptime and comply with HIPAA, PCI-DSS, or SOC 2 as needed. We write all code in-house with senior developers.
We work with CTOs who need a production-grade FastAPI backend fast, startup founders launching a SaaS MVP, and product teams scaling their existing API. We also help enterprises migrate from Flask or Django to FastAPI for better performance.
Types of software we ship.
REST API Development
Build data-driven REST APIs with FastAPI for CRM, e-commerce, or dashboards, connecting to PostgreSQL via SQLAlchemy async sessions.
Microservices Backend
Deploy FastAPI microservices on Kubernetes with Docker, using RabbitMQ for event-driven architecture and independent scaling.
Real-time API Solutions
Implement WebSocket endpoints in FastAPI for live chat, notifications, or collaborative editing with Redis Pub/Sub.
GraphQL API with FastAPI
Wrap FastAPI in Strawberry GraphQL for flexible data queries and mutations, leveraging async resolvers and automatic schema generation.
Third-party API Integration
Connect FastAPI to Stripe, Salesforce, or HubSpot with automatic retry, rate limiting, and data sync pipelines.
AI/ML API Backend
Serve machine learning models via FastAPI endpoints with inference caching, batch processing, and model versioning.
Authentication & Authorization API
Build OAuth2, JWT, or SAML-based auth systems using FastAPI's Security utilities and OAuth2PasswordBearer with scoped roles.
Data Processing Pipeline
Use FastAPI with Celery and Redis for background task processing, file uploads, and ETL workflows with progress tracking.
We build for every business type.
SaaS & Enterprise Software
E-commerce & Retail
Healthcare & Fintech
Media & Communication
Data & AI
FastAPI API development by numbers
We deliver production-grade FastAPI backends with measurable results.
Our team has shipped over 200 products, many powered by Python FastAPI. Each API is built for performance and reliability from day one.
Average delivery is 12 weeks, with 99.9% uptime across all production deployments. We use k6 load testing to guarantee throughput.
Generic dev shops vs. IRPR FastAPI experts
Most agencies promise FastAPI expertise but deliver generic Python code.
Many shops claim FastAPI experience but use synchronous frameworks with minor async changes. They skip optimization and documentation.
IRPR builds pure FastAPI with async endpoints, automatic OpenAPI specs, and production-grade CI/CD. You get a real FastAPI backend, not a ported Django app.
- Uses Django or Flask with FastAPI slapped on
- No async optimization
- Ignores OpenAPI spec
- No CI/CD for APIs
- No load testing
- Hourly billing with scope creep
- Pure FastAPI with async endpoints
- Database optimization with SQLAlchemy + async
- Auto-generated OpenAPI docs
- GitHub Actions CI/CD with test coverage
- k6 load testing up to 10K RPS
- Fixed price from Roadmap phase
How we build your FastAPI backend
Our 4-phase process turns your idea into a production API.
We follow a phased approach to build your FastAPI backend.
Each phase ends with a deliverable you can verify and sign off.
What ships with your FastAPI backend
You get a production-ready API with everything included.
Every project comes with a complete deployment package.
You get everything needed to run, monitor, and scale your API.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Auto-generated OpenAPI 3.0 docs
- Docker images for local dev and production
- Kubernetes deployment manifests
- Sentry error tracking
- Prometheus + Grafana dashboards
- Load test reports (k6)
- Postman collection for testing
- 30-day post-launch support
What we ship in this practice.
SaaS API for invoice generation
A fintech startup needed a FastAPI backend to generate PDF invoices at scale. We built async endpoints with Celery batch processing, reducing generation time from 30s to 2s per invoice. Tech stack: FastAPI, Celery, Redis, PostgreSQL, WeasyPrint.
Real-time booking API for travel
A travel agency required real-time availability checks across 30+ suppliers. We implemented FastAPI WebSocket endpoints and caching with Redis, achieving 99.9% uptime and 200ms response times. Tech stack: FastAPI, Redis, WebSockets, Docker.
HIPAA-compliant patient records API
A healthcare provider needed a secure API for patient data exchange. We built FastAPI endpoints with OAuth2 and JWT, encrypted storage, and achieved HIPAA compliance. Handles 10,000 concurrent requests with 1.2s average response. Tech stack: FastAPI, SQLAlchemy, Alembic, AWS KMS.
E-commerce product search API
An e-commerce brand wanted a fast product search API with faceted filters. We used Elasticsearch with FastAPI async queries, resulting in 3x faster search results and 98% on-time delivery. Tech stack: FastAPI, Elasticsearch, Docker, Kubernetes.
AI content moderation API
A media platform needed a backend for automated content moderation. We built FastAPI endpoints that call a TensorFlow model, with asynchronous processing and task queues. Reduced manual review by 80%. Tech stack: FastAPI, Celery, TensorFlow, Redis, AWS S3.
IoT data ingestion pipeline
A logistics company needed to ingest sensor data from 5,000 devices. We designed a FastAPI microservice with Kafka integration and time-series storage in TimescaleDB. Handles 50,000 events per second with 99.99% uptime. Tech stack: FastAPI, Kafka, TimescaleDB, Docker.
Why teams hire us.
Senior engineers, not juniors
We assign only senior Python engineers with 5+ years experience. No outsourced teams. Each IRPR engineer ships code on day one.
Fixed price from week 2
After the Roadmap phase (week 1-2), you get a fixed price for the entire build. No hourly billing, no surprise invoices, no scope creep charges.
Production-ready in 8-12 weeks
Your first working backend ships in 8-12 weeks, not 6+ months. We skip fluff and focus on what matters: a deployable API with tests, docs, and monitoring.
Full code ownership
You own every line of code. We hand over the GitHub repo, CI/CD pipeline, Docker files, and all documentation. No license fees, no vendor lock-in.
Compliance built in, not bolted on
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliance into the API architecture from day one. No costly retrofits later.
Dedicated product team
You get a project manager, senior engineers, and a QA engineer assigned to your project. They work during your business hours, not opposite timezones.
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.
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