Leading FastAPI Development PartnerDevelopment Partner
We build high-performance APIs with FastAPI. Get a production-ready MVP in 12 weeks with fixed pricing.
IRPR is a leading FastAPI development partner. We build async APIs, microservices, and backend systems using FastAPI, Python 3.12, SQLAlchemy, Redis, and Docker. Every API is designed for speed, type safety, and automatic OpenAPI docs.
We ship production code in 12 weeks for MVPs and 16-20 weeks for complex platforms. Pricing starts at $80K for a single API and goes to $250K for multi-service architectures. Our APIs meet HIPAA, PCI-DSS, and SOC 2 compliance standards.
CTOs hire us when they need a scalable backend fast. Startup founders hire us to validate their product with a real API. Enterprise teams hire us to replace slow monoliths with FastAPI microservices. We work with US-based clients in New York, San Francisco, Austin, and remotely.
Types of software we ship.
REST API
Build a RESTful API with FastAPI, Pydantic models, and automatic OpenAPI docs. Includes rate limiting and JWT auth.
Microservices Platform
Decompose a monolith into FastAPI microservices with gRPC, Redis message queues, and Kubernetes orchestration.
Real-time Data Pipeline
Stream data with FastAPI WebSocket support, Kafka producers, and async background tasks. Handles 10K+ events per second.
SaaS Backend
Build a multi-tenant SaaS backend with FastAPI, Stripe Billing, PostgreSQL row-level security, and usage metering.
AI API Wrapper
Wrap OpenAI, Anthropic, or custom ML models in a FastAPI endpoint with prompt caching, token tracking, and fallback logic.
Ecommerce API
Create a headless ecommerce API with FastAPI, Shopify GraphQL integration, cart management, and Stripe checkout.
Admin Dashboard Backend
Build a FastAPI backend for admin dashboards with SQLAlchemy ORM, Celery task queues, and CSV/PDF report generation.
Healthcare API
Develop a HIPAA-compliant FastAPI backend with FHIR resources, audit logging, and encrypted data storage on AWS.
We build for every business type.
SaaS companies
Fintech firms
Healthcare organizations
Ecommerce brands
Enterprise IT
Why choose IRPR as your leading FastAPI development partner
We have shipped over 200 products using FastAPI since 2020.
Our team of senior Python engineers has built APIs for startups and Fortune 500 companies. We use FastAPI because it is the fastest Python framework for building async APIs. In benchmark tests, FastAPI handles 40,000 requests per second on a single server.
Every API we build includes automatic OpenAPI documentation, Pydantic validation, and async database sessions. We deploy on AWS ECS with auto-scaling and CloudWatch monitoring. Our average API response time is under 50 milliseconds.
Generic dev shops vs IRPR as your FastAPI partner
Most agencies treat FastAPI like Flask. We treat it as a serious async framework.
Generic dev shops often use FastAPI as a drop-in replacement for Flask. They skip async database sessions, ignore Pydantic performance tuning, and write blocking code. This leads to APIs that scale poorly and have no type safety.
IRPR builds FastAPI from the ground up with async SQLAlchemy, connection pooling, and Redis caching. We write tests for every endpoint and set up CI/CD on GitHub Actions. Our APIs pass load tests at 10,000 concurrent users.
- Uses sync endpoints for database calls
- No Pydantic model tuning
- No automated API documentation
- Deploys on a single server
- No load testing
- No async background tasks
- Async SQLAlchemy with connection pooling
- Optimized Pydantic schemas for performance
- Automatic OpenAPI docs with Swagger UI
- Docker + AWS ECS with auto-scaling
- Load tests at 10,000 concurrent users
- Celery + Redis for async task queues
How we build your FastAPI project
Our process is designed for speed and quality.
We start with a 2-week Roadmap phase where we define the API contract, data models, and deployment strategy. You get a fixed price quote before any development begins.
Then we build in 2-week sprints with daily standups and a shared Slack channel. You see working endpoints every sprint. We deploy to a staging environment after sprint 2.
What ships with your FastAPI project
Every project includes these deliverables.
You own everything we build. We ship the complete source code, infrastructure code, and documentation. No black boxes, no proprietary frameworks.
Our standard delivery includes a CI/CD pipeline, monitoring dashboards, and a postman collection for testing. You can deploy the API yourself or we can manage it.
- Source code in your private GitHub repo
- CI/CD pipeline on GitHub Actions
- Docker Compose for local development
- AWS CloudFormation or Terraform templates
- Sentry error tracking
- CloudWatch dashboards for API metrics
- Postman collection with all endpoints
- API documentation (OpenAPI/Swagger)
- Database migration scripts (Alembic)
- 30-day post-launch support
What we ship in this practice.
Fintech Payment API
Built a FastAPI payment processing API that handles 5,000 transactions per minute. Integrated with Stripe Connect and Plaid. Reduced transaction latency by 60% compared to the previous Django-based API. Tech stack: FastAPI, PostgreSQL, Redis, Stripe, AWS ECS.
SaaS Subscription Backend
Developed a multi-tenant SaaS backend with FastAPI and SQLAlchemy. Supports 500+ tenants with row-level security. Integrated Stripe Billing for subscription management. Tech stack: FastAPI, PostgreSQL, Stripe, Redis, Docker.
Healthcare Telemedicine API
Created a HIPAA-compliant FastAPI backend for a telemedicine platform. Handles 10,000 patient appointments per month. Includes FHIR-compliant data models and encrypted video call metadata. Tech stack: FastAPI, PostgreSQL, AWS KMS, Twilio Video.
Ecommerce Headless API
Built a headless ecommerce API with FastAPI that powers a React storefront. Handles 200,000 product SKUs and 50,000 orders per month. Integrated with Shopify for inventory sync and Stripe for payments. Tech stack: FastAPI, MongoDB, Shopify GraphQL, Stripe.
Real-time Data Pipeline
Developed a FastAPI WebSocket server that streams real-time stock market data to 1,000 concurrent clients. Processes 100,000 messages per second with Kafka as the message broker. Tech stack: FastAPI, Kafka, Redis, WebSockets, AWS EC2.
Manufacturing IoT API
Built a FastAPI backend for an IoT sensor network in a manufacturing plant. Ingests 50,000 sensor readings per second from 10,000 devices. Provides real-time dashboards and anomaly detection alerts. Tech stack: FastAPI, TimescaleDB, MQTT, Grafana, AWS IoT Core.
Why teams hire us.
Senior FastAPI engineers only
Every engineer on your project has 5+ years of Python experience and has shipped at least 3 FastAPI projects. We do not outsource or hire juniors. You work directly with the team building your API.
Fixed price, not hourly
We quote a fixed price after the Roadmap phase. No hourly billing, no surprise invoices. Our average FastAPI project costs $80K-$250K depending on complexity.
12-week MVP guarantee
We ship a production-ready FastAPI MVP in 12 weeks. If we miss the deadline, you get 20% off your next sprint. We have delivered on time for 98% of our projects.
Full code ownership
You own every line of code we write. We do not use proprietary frameworks or license fees. The source code is in your GitHub repo from day one.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs by default. Our FastAPI projects include audit logging, encryption at rest, and role-based access control.
Post-launch support included
We provide 30 days of bug fixes and monitoring after launch. We also offer ongoing maintenance at a fixed monthly rate starting at $5K per month.
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.