Experienced FastAPI Development AgencyFastAPI Development
We build production-ready APIs with FastAPI. Ship your MVP in 8-12 weeks with a fixed price.
IRPR builds high-performance backends using FastAPI, Pydantic, SQLAlchemy, and async/await patterns. Our FastAPI projects auto-generate OpenAPI documentation and include comprehensive validation.
We deliver a production-ready FastAPI MVP in 8-12 weeks. Pricing is fixed and ranges from $80K to $250K depending on complexity. Our infrastructure meets SOC 2, GDPR, and HIPAA compliance standards.
SaaS founders hire us to build scalable API backends fast. Enterprise teams bring us in to migrate from synchronous frameworks to async Python. Startups working on data-intensive applications trust us for reliable, high-throughput APIs.
Types of software we ship.
REST API Development
Build resource-oriented APIs with FastAPI, full CRUD, pagination, and authentication via JWT or OAuth2.
Microservices Architecture
Design and implement decoupled services with FastAPI, event-driven communication, and Docker orchestration.
GraphQL API
Expose flexible queries using FastAPI with Strawberry or Ariadne, reducing over-fetching and under-fetching.
Real-time API (WebSocket)
Add WebSocket endpoints to FastAPI for live notifications, chat, or streaming data with async support.
API Integration Layer
Create a unified FastAPI gateway that aggregates third-party APIs (Stripe, Salesforce, HubSpot) with caching.
Backend for Mobile App
Develop a FastAPI backend optimized for mobile clients, with push notifications, offline sync, and Firebase integration.
Data Pipeline API
Build FastAPI endpoints that ingest, transform, and serve large datasets using async workers and Kafka.
API Gateway
Deploy a FastAPI-based gateway with rate limiting, authentication, and request routing to downstream services.
We build for every business type.
SaaS platforms
Data-intensive applications
Mobile app backends
Company stages
Architecture patterns
Why choose an experienced FastAPI development agency
We deliver FastAPI projects that scale from day one.
IRPR has shipped over 200 products, many with FastAPI backends that handle millions of requests daily. Our engineers write async code, validate with Pydantic, and generate OpenAPI specs automatically.
Every project includes CI/CD, Docker containers, and monitoring. We target 99.9% uptime and provide a 30-day post-launch support window.
Generic dev shop vs IRPR
Not all agencies understand FastAPI. Here is how we differ.
Generic shops treat FastAPI like Flask or Django. They miss async patterns, skip Pydantic validation, and deliver slow APIs.
IRPR specializes in FastAPI. We use async endpoints, proper dependency injection, and auto-generated docs. Your API ships faster and performs better.
- No FastAPI expertise
- Hourly billing with no cap
- Unclear timelines
- No async/await patterns
- Poor documentation
- No post-launch support
- FastAPI specialists with 200+ projects
- Fixed price, no surprises
- 8-12 week delivery
- Async-first, Pydantic validated
- OpenAPI docs auto-generated
- Sentry monitoring included
Our FastAPI development process
We follow a four-phase process that keeps your project on track.
Every project starts with a Discovery call to define scope, goals, and constraints. We then move to a Roadmap phase where we produce a fixed quote and timeline.
Development happens in two-week sprints with continuous delivery. After launch, we provide 30 days of support to ensure a smooth handoff.
What ships with every FastAPI project
You get more than just code. Here is exactly what we deliver.
Every project includes a fully configured development environment, automated tests, and production deployment scripts. We push code to your GitHub repository from day one.
Documentation is auto-generated from OpenAPI specs. Monitoring and error tracking are set up before launch.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- Docker Compose configuration
- Auto-generated OpenAPI docs
- Pydantic models and validation
- Async database migrations (Alembic)
- Sentry error tracking
- Unit and integration tests
- Deployment scripts for AWS/GCP/Azure
- Post-launch support for 30 days
What we ship in this practice.
Real-time analytics API for a fintech startup
We built a FastAPI backend that ingests financial transactions and serves real-time dashboards. The async architecture reduced query latency by 60% and handled 100k concurrent connections. Stack: FastAPI, Redis, PostgreSQL, AWS Lambda.
Microservices backend for a healthcare platform
IRPR designed a HIPAA-compliant microservices system using FastAPI. The platform handles 50k concurrent users with 99.9% uptime and processes PHI securely. Stack: FastAPI, Docker, Kubernetes, HIPAA-compliant infrastructure.
API integration layer for an ecommerce marketplace
We created a unified FastAPI gateway that aggregates 10+ third-party APIs (Stripe, Shopify, ShipStation) into a single schema. The client reduced integration time by 40%. Stack: FastAPI, Stripe, Shopify API, Celery.
Backend for a mobile app (EdTech)
For an education platform, we built a FastAPI backend with Firebase authentication and push notifications. The MVP shipped in 10 weeks and reduced time-to-market by 40%. Stack: FastAPI, Firebase, GraphQL, Apollo.
Data pipeline API for a logistics company
We developed a FastAPI service that ingests 1M+ daily tracking events via Kafka and serves them to a dashboard. The async pipeline processes events with sub-100ms latency. Stack: FastAPI, Kafka, PostgreSQL, Redis.
High-performance API for a media platform
IRPR built a FastAPI content delivery API that serves 10M requests per day with sub-50ms response times. Caching and async endpoints eliminated database bottlenecks. Stack: FastAPI, CDN, Redis, PostgreSQL.
Why teams hire us.
FastAPI specialists from day one
Our engineers have built 40+ FastAPI projects. We know async patterns, Pydantic validation, and OpenAPI generation inside out.
Fixed price, not hourly
Every project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices.
8-12 week MVP delivery
We ship a production-ready MVP in 8-12 weeks. Our record is 6 weeks for a fintech API.
Async-first architecture
We use FastAPI's async capabilities to handle high concurrency. Typical throughput is 10x higher than synchronous Django.
Full code ownership
You own every line of code. We push to your GitHub repository from day one.
Post-launch support included
We provide 30 days of post-launch support with a 4-hour SLA. No retainer needed.
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.