Experienced FastAPI Development VendorFastAPI Development
We build production FastAPI backends in 8-12 weeks. Fixed price, senior engineers only.
IRPR is an experienced FastAPI development vendor. We build async Python APIs using FastAPI, SQLAlchemy, Pydantic, PostgreSQL, and Redis. Every project gets a senior backend engineer who has shipped production FastAPI code before.
We deliver a working FastAPI backend in 8-12 weeks. Pricing is fixed, starting at $80K and going to $250K for complex systems with microservices, event queues, and multi-region deployment. We handle HIPAA, PCI-DSS, and SOC 2 compliance out of the box.
Our clients are CTOs at Series A SaaS companies who need a scalable API fast. Product managers at fintech startups who need PCI-compliant payment backends. Engineering directors at healthcare platforms who need HIPAA-compliant data pipelines. And founders who want a production-grade MVP without hiring a full team.
Types of software we ship.
REST API development
Build RESTful APIs with FastAPI, OpenAPI docs, and JWT auth. Integrates with Stripe, Twilio, SendGrid.
Microservices architecture
Design event-driven microservices with FastAPI, RabbitMQ, Celery, and Docker. Handles 10K+ requests per second.
GraphQL API development
Build GraphQL backends with FastAPI and Strawberry. Supports subscriptions, batching, and caching with Redis.
Data pipeline API
Create ETL pipelines with FastAPI, Apache Kafka, and PostgreSQL. Processes 1M+ records per hour.
Real-time API
Build WebSocket-based real-time APIs with FastAPI. Used for live dashboards, chat, and notifications.
Admin dashboard backend
Develop admin panel backends with FastAPI, SQLAdmin, and Role-Based Access Control. Ships with 20+ prebuilt endpoints.
Third-party integration API
Build integration backends connecting to Salesforce, HubSpot, Shopify, and Stripe. Handles OAuth2 and webhooks.
AI/ML model serving API
Deploy ML models with FastAPI, ONNX, and Redis. Achieves sub-100ms inference latency.
We build for every business type.
SaaS platforms
fintech applications
healthcare platforms
ecommerce and retail
real estate and proptech
Why choose an experienced FastAPI development vendor
FastAPI is fast to write but hard to get right in production.
FastAPI gives you automatic OpenAPI docs, dependency injection, and async support. But building a production API means handling rate limiting, database connection pooling, background task queues, and monitoring. IRPR has shipped 200+ FastAPI-based products across 50+ countries. We know the pitfalls.
We use FastAPI with SQLAlchemy 2.0 for async database access, Celery for background tasks, Redis for caching, and Sentry for error tracking. Every API gets a CI/CD pipeline with GitHub Actions, automated tests with pytest, and deployment on AWS ECS or Kubernetes.
The difference between a FastAPI coder and an experienced vendor
Not every FastAPI developer can build a production-grade backend.
A junior developer can create a FastAPI app in a weekend. But they will miss connection pooling, proper error handling, async database sessions, and monitoring. IRPR brings 12+ years of Python experience per engineer. We have built APIs that handle 50K concurrent users.
We write tests first. Every endpoint gets unit tests with pytest, integration tests with TestClient, and load tests with Locust. We ship with a monitoring stack: Sentry for errors, Prometheus for metrics, Grafana for dashboards. Your API logs every request and response.
- Hourly billing with no cap
- Junior developers learning on your dime
- No async database setup
- No CI/CD pipeline
- No error monitoring
- No load testing
- Fixed price from day one
- Senior engineers only, 10+ years experience
- Async SQLAlchemy with connection pooling
- CI/CD with GitHub Actions and automated tests
- Sentry error tracking and Prometheus metrics
- Load tested to 10K concurrent requests
How we build your FastAPI backend in 8-12 weeks
Our process is designed for speed and clarity.
We start with a 2-week Roadmap phase. You get a detailed specification: API endpoints, database schema, authentication flow, and deployment architecture. You approve the roadmap, and we lock the price. No surprises.
Then we build in 2-week sprints. You see a working API after the first sprint. We deploy to a staging environment on AWS. You test endpoints with Swagger UI. At week 8-12, you have a production-ready FastAPI backend deployed on your AWS account.
What ships with your FastAPI backend
You get more than code. You get a production system.
Every FastAPI project from IRPR includes a complete deployment setup. We use Terraform for infrastructure, GitHub Actions for CI/CD, and Docker for containerization. Your API runs on AWS ECS with auto-scaling.
You also get a Postman collection with every endpoint tested, a README with setup instructions, and a 30-minute walkthrough call. We do not disappear after launch. We offer 4 weeks of post-launch support at no extra cost.
- Source code in your GitHub repository
- CI/CD pipeline with GitHub Actions
- Automated tests with pytest (90%+ coverage)
- Dockerfile and docker-compose for local dev
- Terraform scripts for AWS deployment
- Sentry error tracking configured
- Prometheus metrics and Grafana dashboard
- Postman collection with all endpoints
- API documentation (auto-generated OpenAPI)
- 4 weeks of post-launch support
What we ship in this practice.
SaaS analytics backend
Built a FastAPI backend for a SaaS analytics platform handling 10M events per day. Used FastAPI with Celery for async event processing and PostgreSQL with TimescaleDB for time-series data. Reduced API latency by 40% compared to the previous Django setup. Tech stack: FastAPI, Celery, PostgreSQL, Redis, AWS ECS.
Fintech payment API
Developed a PCI-DSS compliant payment processing API with FastAPI. Integrated with Stripe and Plaid for payments and bank accounts. Handled 5,000 transactions per minute during peak hours. Tech stack: FastAPI, Stripe, Plaid, PostgreSQL, AWS ECS with Fargate.
Healthcare data pipeline
Built a HIPAA-compliant data ingestion API for a telemedicine platform. FastAPI endpoints received HL7 FHIR messages and stored them in PostgreSQL with encryption at rest. Processed 1M patient records in the first month. Tech stack: FastAPI, FHIR, PostgreSQL, AWS KMS, Sentry.
Ecommerce inventory API
Created a real-time inventory management API for an ecommerce brand with 50K SKUs. Used FastAPI with WebSocket for live stock updates. Integrated with Shopify and Amazon MWS. Reduced stockouts by 30%. Tech stack: FastAPI, WebSocket, Redis, Shopify API, PostgreSQL.
Real estate MLS API
Built a FastAPI backend aggregating MLS data from 20+ sources. Used async PostgreSQL queries with SQLAlchemy to return property listings in under 200ms. Served 500 real estate agents daily. Tech stack: FastAPI, PostgreSQL, Redis, AWS Lambda for data ingestion.
EdTech assessment API
Developed a FastAPI backend for an online assessment platform. Handled 10,000 concurrent test-takers with WebSocket-based progress tracking. Integrated with Stripe for payments and SendGrid for notifications. Tech stack: FastAPI, WebSocket, PostgreSQL, Redis, Stripe, SendGrid.
Why teams hire us.
Senior FastAPI engineers only
Every engineer on your project has 10+ years of Python experience and has shipped at least 5 FastAPI backends. No juniors, no learning curve.
Fixed price from the roadmap
After the 2-week Roadmap phase, we lock the price. You know the cost before we write a single line of production code. No hourly billing.
Production-ready from day one
We include CI/CD, monitoring, error tracking, and load testing in every project. Your API ships with Sentry, Prometheus, and Grafana configured.
HIPAA and PCI-DSS compliance built in
We have built FastAPI backends for healthcare and fintech clients. We handle encryption, audit logging, and access controls out of the box.
Async by default
We use FastAPI's async capabilities with async SQLAlchemy and Redis. Your API handles thousands of concurrent requests without blocking.
You own everything
Source code, Docker images, Terraform scripts, and documentation are all yours. No licensing fees, no vendor lock-in.
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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