Professional FastAPI Development AgencyDevelopment Agency
We build high-performance APIs with FastAPI and Python. Ship production-ready microservices in 8-12 weeks.
IRPR builds production-grade APIs using FastAPI, Python 3.12, Pydantic v2 for validation, and SQLAlchemy for ORM. Our team of senior engineers designs async microservices that handle thousands of requests per second.
Every project includes a complete API with auto-generated OpenAPI docs, CI/CD pipeline on GitHub Actions, and Sentry error tracking. Typical delivery takes 8-12 weeks with fixed pricing from $80K to $250K. We follow PCI-DSS and HIPAA compliance where needed.
Startup CTOs hire us to build their core API from scratch. Product managers at mid-market companies bring us in to replace legacy Rails or Django apps. Enterprise teams engage us to add FastAPI services to their existing stack. SaaS founders need a scalable backend for their MVP.
Types of software we ship.
High-Performance API Gateway
Route requests, enforce rate limits, and aggregate responses from multiple services using FastAPI async handlers and Redis caching.
Real-Time Data Pipeline
Ingest streaming data from Kafka or RabbitMQ with FastAPI background tasks and async generators for low-latency processing.
Async Microservices Backend
Deploy independent FastAPI services communicating via gRPC or REST, each scoped to its own database with Alembic migrations.
RESTful CRUD Application
Standard REST API with full CRUD, pagination, filtering, and auto-generated OpenAPI docs using SQLAlchemy and Pydantic.
Background Task Processing Service
Run scheduled jobs, email sends, or data syncs with FastAPI BackgroundTasks and Celery workers.
WebSocket Server for Live Updates
Native WebSocket support in FastAPI for real-time dashboards, chat, or notifications with automatic reconnection.
Integration Middleware
Connect legacy systems and third-party APIs through a FastAPI middleware layer with caching, retry logic, and circuit breakers.
Machine Learning Model Serving API
Wrap ML models in FastAPI endpoints with async inference, request batching, and Prometheus monitoring for production.
We build for every business type.
SaaS companies
Fintech firms
Healthcare organizations
Ecommerce brands
Media and content platforms
Why choose a professional FastAPI development agency?
IRPR ships over 200 products for clients in 50+ countries.
Our senior engineers have built FastAPI backends for fintech, healthcare, and SaaS clients. We write clean, typed code with Pydantic v2 and async SQLAlchemy.
Every project follows a fixed-price roadmap so you know costs upfront. We ship in 8-12 weeks with full CI/CD and monitoring.
Professional FastAPI development vs. hiring freelancers
Many teams start with a solo developer, but end up with inconsistent code and no documentation.
Freelancers often underbid and then disappear or deliver spaghetti code. You have no guarantee of performance, security, or ongoing maintenance.
At IRPR, you get a full team of senior engineers, project managers, and QA. We deliver a production-ready API with automated tests, deployment scripts, and a clear upgrade path.
- no fixed timeline
- no shared documentation
- no CI/CD
- no performance testing
- single point of failure
- no post-deployment support
- fixed 8-12 week timeline
- auto-generated OpenAPI docs
- CI/CD with GitHub Actions
- load testing with Locust
- team of senior engineers
- ongoing maintenance and support
How we build your FastAPI API
Our process takes your idea from specification to production in four phases.
We start with a 1-week Roadmap phase that validates your requirements and produces a fixed-price quote. During architecture design, we choose the right database and infrastructure.
Over the next 6-10 weeks, we build the API with daily standups and weekly demos. After deployment, we hand over full source code and documentation.
What ships with your FastAPI project
All projects include these deliverables.
You get full source code in your Git repo, Dockerized application with production configuration, CI/CD pipeline via GitHub Actions, auto-generated OpenAPI 3.0 documentation, Sentry error tracking, Prometheus metrics, load testing scripts, and a deployment guide.
- Source code in your private repository
- Docker Compose and Dockerfile
- GitHub Actions CI/CD pipeline
- OpenAPI 3.0 documentation
- Sentry error tracking integrated
- Prometheus and Grafana monitoring
- Locust load testing suite
- Deployment guide (AWS ECS)
- Adminer or pgAdmin for database
- Postman collection for testing
What we ship in this practice.
Payment processing API for a fintech startup
Built a FastAPI backend that handles 500 transactions per second with idempotency keys and Stripe integration. Reduced transaction failure rate to 0.1%. Tech stack: FastAPI, PostgreSQL, Redis, Stripe API.
Telemedicine platform backend
Created a HIPAA-compliant API with WebRTC signaling and appointment scheduling. Handles 10,000 concurrent users. Tech stack: FastAPI, MongoDB, WebSockets, Twilio.
SaaS analytics dashboard API
Developed a FastAPI service that aggregates data from multiple sources and serves real-time dashboards. Cut query time from 5 seconds to 200ms. Tech stack: FastAPI, ClickHouse, Kafka, Prometheus.
Ecommerce recommendation engine API
Built a microservice that serves personalized product recommendations via FastAPI. Increased conversion rate by 15%. Tech stack: FastAPI, Redis, TensorFlow, PostgreSQL.
Logistics route optimization API
Designed an async API for route calculation that processes 1,000 pickup requests in under 2 seconds. Reduced dispatch time by 30%. Tech stack: FastAPI, PostgreSQL, Google Maps API, Celery.
Media content moderation API
Built a FastAPI service that scans uploaded images and videos for policy violations. Processes 500 files per minute with 98% accuracy. Tech stack: FastAPI, AWS Rekognition, S3, RabbitMQ.
Why teams hire us.
Fixed price, not time and materials
Every FastAPI project starts with a 1-week Roadmap phase that defines the exact scope. You get a fixed price for the full build, so there are no surprises.
Senior engineers only
Our team consists of engineers with 8+ years of Python experience and deep FastAPI expertise. No juniors, no offshore contractors.
Production-ready from day one
We ship with CI/CD, monitoring, error tracking, and load testing built in. Your API is ready for real users from the moment it goes live.
Compliance built in
We handle HIPAA, PCI-DSS, and SOC 2 requirements as part of the architecture. Our engineers know how to implement audit logging, encryption, and access controls.
Full code ownership
You own all source code, documentation, and infrastructure configurations. There is no lock-in, no license fees, no ongoing royalties.
8-12 week delivery guarantee
We have shipped over 200 products, 98% on time or early. Our fixed timeline means you can plan your launch with confidence.
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.