FastAPI development vendordevelopment vendor
We build production-grade FastAPI backends in 8-12 weeks. Fixed price, senior engineers, full ownership.
IRPR is a FastAPI development vendor that builds high-performance backends for startups and enterprises. We use FastAPI, Pydantic v2, SQLAlchemy 2.0, and async PostgreSQL to deliver APIs that handle thousands of requests per second.
Every project ships with a fixed price quote after a 2-week Roadmap phase. Typical MVPs take 8-12 weeks and cost $80K-$250K. We support compliance standards like HIPAA, PCI-DSS, and SOC 2.
Founders hire us when they need a production-ready API fast. CTOs hire us to replace slow Django or Flask backends. Product managers hire us to build internal tools with real-time data. Investors hire us to de-risk technical execution.
Types of software we ship.
REST API backend
Stateless REST APIs with FastAPI, JWT auth, and OpenAPI docs auto-generated from Pydantic schemas.
Real-time data pipeline
Async data ingestion with FastAPI, Redis Streams, and Celery workers for ETL jobs.
Microservices gateway
API gateway built with FastAPI routing to multiple microservices, each deployed in Docker containers.
WebSocket server
Real-time WebSocket endpoints using FastAPI's WebSocket support for chat, notifications, and live dashboards.
Admin dashboard API
FastAPI backend for admin panels with role-based access control, audit logs, and CSV export.
Third-party integration service
FastAPI service that connects to Stripe, HubSpot, or Salesforce via async HTTP clients and webhooks.
ML model serving API
Deploy ML models with FastAPI endpoints, ONNX runtime, and background task processing.
File processing API
Async file upload and processing pipeline with FastAPI, S3, and background task workers.
We build for every business type.
SaaS and platform companies
Data-heavy applications
Healthcare and fintech
Ecommerce and retail
Internal tools and automation
Why choose IRPR as your FastAPI development vendor
We ship FastAPI backends that run in production from day one.
IRPR has delivered 200+ products using FastAPI, Python 3.12, and async PostgreSQL. Every API we build includes auto-generated OpenAPI docs, Pydantic validation, and unit tests with 90%+ coverage.
Our engineers average 8+ years of Python experience. We write async code that scales to thousands of concurrent requests without blocking. We deploy on AWS ECS or Railway with zero-downtime updates.
Generic dev shop vs IRPR as your FastAPI development vendor
Not all vendors deliver production-grade FastAPI backends.
Many agencies claim FastAPI expertise but ship code that blocks on I/O, lacks type hints, or fails under load. They use hourly billing and change scope mid-project.
IRPR delivers fixed-price FastAPI projects with senior engineers. We write async code, enforce Pydantic validation, and deploy with CI/CD pipelines on GitHub Actions.
- Hourly billing with no fixed price
- Junior developers learning FastAPI on your dime
- Synchronous code that blocks under load
- No OpenAPI docs or auto-generated clients
- Manual deployments with downtime
- No performance testing or load testing
- Fixed price after a 2-week Roadmap phase
- Senior Python engineers with 8+ years experience
- Async/await code with asyncio and uvicorn
- Auto-generated OpenAPI docs from Pydantic schemas
- Zero-downtime deployments via GitHub Actions + ECS
- Load testing with locust and 99.9% uptime SLA
Our FastAPI development process
We follow a structured 4-phase process to deliver your backend.
Every project starts 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 we write a single line of code.
After the Roadmap, we build your FastAPI backend in 8-12 weeks. We ship in 2-week sprints with demos every Friday. You see working endpoints from week 1.
What ships with every FastAPI project
You get a production-ready backend, not just code.
IRPR delivers a complete backend system with everything needed to run in production. You own the code, the infrastructure, and the documentation from day one.
We include monitoring, error tracking, and performance dashboards so you can sleep through the night.
- Full source code in your GitHub repository
- Auto-generated OpenAPI docs (Swagger UI + ReDoc)
- CI/CD pipeline on GitHub Actions with automated tests
- Dockerized FastAPI app with docker-compose for local dev
- PostgreSQL database schema with Alembic migrations
- JWT-based authentication with refresh tokens
- Sentry error tracking and Datadog APM monitoring
- Load testing report with locust
- Deployment guide and runbook
- 30-day warranty with bug fixes
What we ship in this practice.
Multi-tenant SaaS backend for a B2B analytics platform
Built a FastAPI backend with async PostgreSQL and Redis caching. Handles 10,000+ requests per second with sub-50ms response times. Reduced server costs by 40% compared to the previous Django backend.
HIPAA-compliant patient data API for a health tech startup
Developed a FastAPI service with Pydantic v2 for strict data validation and async endpoints for EHR integration. Passed HIPAA audit on first try. Shipped in 10 weeks.
Real-time payment processing API for a fintech company
Created a FastAPI microservice with WebSocket support for fraud detection alerts. Integrated with Stripe and Plaid. Processes $2M in transactions daily with 99.99% uptime.
Product catalog API for a D2C ecommerce brand
Built a FastAPI backend with Elasticsearch for full-text search and Redis for caching. Handles 500,000 product queries per hour. Reduced page load time by 60%.
Internal workflow automation API for a logistics company
Delivered a FastAPI service with Celery workers for batch processing and WebSocket notifications for real-time updates. Automated 80% of manual data entry tasks. Saved 50 hours per week.
ML model serving API for a real estate analytics platform
Deployed a FastAPI endpoint with ONNX runtime for property valuation predictions. Handles 1,000 concurrent requests with 200ms latency. Integrated with MLS data feeds.
Why teams hire us.
Senior engineers only, no juniors
Every engineer on your project has 8+ years of Python experience and has shipped FastAPI in production. We do not outsource to junior developers.
Fixed price after a 2-week Roadmap
You get a fixed price quote after the Roadmap phase (week 2). No hourly billing, no scope creep, no surprise invoices. The price covers all endpoints, tests, and deployment.
Production-grade from day one
Every FastAPI backend ships with auto-generated OpenAPI docs, Pydantic validation, async database queries, and CI/CD pipelines. You get a staging environment in week 2.
Full ownership of code and infrastructure
You own the source code, the Docker images, the CI/CD pipeline, and the deployment scripts. There is no lock-in, no license fees, no ongoing royalty.
Compliance-ready for HIPAA, PCI-DSS, and SOC 2
We build FastAPI backends that meet HIPAA, PCI-DSS, and SOC 2 requirements. We implement encryption at rest, audit logging, and role-based access control.
Start in 1-2 weeks, not months
We can kick off a new FastAPI project within 1-2 weeks of signing. Our async-first workflow means we can overlap with your team from day one.
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.