Affordable FastAPI Development PartnerDevelopment Partner
Build high-performance APIs with Python's fastest framework. Fixed pricing from $80K, delivered in 12 weeks.
IRPR builds production-grade FastAPI backends for companies that need speed and reliability. We use FastAPI with Pydantic v2, SQLAlchemy 2.0, and async PostgreSQL to deliver APIs that handle 10,000+ requests per second with sub-50ms latency.
Every project ships with a complete FastAPI application, OpenAPI documentation, CI/CD pipeline on GitHub Actions, and Docker containerization. Typical timeline is 8-12 weeks for an MVP with pricing from $80K to $250K. We support HIPAA, PCI-DSS, and SOC 2 compliance out of the box.
We work with CTOs who need a scalable backend fast, startup founders validating a SaaS idea, enterprise teams modernizing legacy monoliths, and product managers launching API-first products. Each buyer gets a dedicated senior engineer who writes the FastAPI code directly.
Types of software we ship.
REST API development
Build RESTful APIs with FastAPI, Pydantic models, and PostgreSQL. Includes JWT auth, rate limiting, and Swagger docs.
GraphQL API development
Implement GraphQL endpoints with Strawberry or Ariadne on top of FastAPI. Supports subscriptions and batch queries.
Microservices architecture
Design and deploy FastAPI microservices with RabbitMQ, Redis, and Kubernetes. Each service scales independently.
Real-time API development
Add WebSocket support to FastAPI for real-time features like chat, live dashboards, and collaborative editing.
Data pipeline API
Build FastAPI endpoints that ingest, transform, and serve data from Kafka, Snowflake, or S3. Handles millions of events per day.
Third-party API integration
Integrate FastAPI with Stripe, Twilio, SendGrid, and 50+ other APIs. Handles webhooks, retries, and idempotency.
Admin dashboard backend
Create FastAPI-powered admin panels with SQLAdmin, Celery for background tasks, and role-based access control.
Authentication and authorization API
Implement OAuth2, SAML, or OpenID Connect with FastAPI. Supports multi-tenant SSO and fine-grained permissions.
We build for every business type.
SaaS companies
Fintech startups
Healthcare organizations
Ecommerce brands
Enterprise teams
Why FastAPI for your next backend
FastAPI is the fastest Python web framework, and IRPR uses it to ship APIs that perform under load.
FastAPI automatically generates OpenAPI documentation from your code. Every endpoint you build gets interactive Swagger UI and ReDoc docs without extra work. This cuts onboarding time for frontend teams by 40%.
IRPR has shipped 200+ products using FastAPI with Python 3.12. We benchmark every API to handle 10,000 concurrent requests before it goes to production. Our average response time is under 50ms.
How we compare to other FastAPI agencies
Most dev shops bill hourly and deliver late. IRPR works differently.
Generic agencies quote hourly rates and let scope creep inflate budgets. They use junior developers who need weeks to ramp up on FastAPI. Their APIs lack proper error handling, logging, and monitoring.
IRPR assigns a senior engineer who has shipped 10+ FastAPI projects. We give you a fixed price in week 2 during the Roadmap phase. You own the code, the CI/CD pipeline, and the infrastructure from day one.
- Hourly billing with no cap
- Junior developers learning FastAPI on your project
- No OpenAPI docs generated automatically
- Manual deployment with no CI/CD
- No performance benchmarks included
- Code ownership unclear
- Fixed price from $80K
- Senior FastAPI engineer with 10+ projects shipped
- Auto-generated Swagger and ReDoc docs
- CI/CD pipeline on GitHub Actions
- Load testing with 10,000 concurrent requests
- Full code ownership from day one
Our FastAPI development process
We build your API in 4 phases, from idea to production.
Every project starts with a 2-week Roadmap phase where we define the API contract, data model, and deployment architecture. You get a fixed price and timeline before we write a single line of code.
Then we build the API in 6-week sprints. Each sprint ends with a deployable endpoint that your frontend team can integrate immediately. We use FastAPI's dependency injection and Pydantic models to keep the code clean and testable.
What ships with your FastAPI backend
Every project includes more than just code. You get a complete production system.
When we finish your FastAPI project, you own everything: the source code, the CI/CD pipeline, the infrastructure as code, and the documentation. There is no vendor lock-in. You can take the code to any team or deploy it anywhere.
We also include 30 days of post-launch support. During this time we fix any bugs, optimize slow queries, and help your team deploy updates. Our average response time for support tickets is under 2 hours.
- Source code in your private GitHub repo
- CI/CD pipeline on GitHub Actions with automatic tests
- Docker containers for local and production deployment
- OpenAPI documentation with Swagger UI and ReDoc
- Sentry error tracking and performance monitoring
- Datadog dashboards for API metrics and uptime
- Load test report with 10,000 concurrent requests
- Postman collection for manual API testing
- Architecture diagram and API contract document
- 30 days of post-launch support
What we ship in this practice.
SaaS subscription management API
Built a FastAPI backend for a B2B SaaS company that manages 50,000+ subscriptions. The API handles Stripe webhooks, prorated billing, and usage tracking. Reduced billing errors by 90% and cut invoice generation time from 4 hours to 2 minutes. Tech stack: FastAPI, Stripe, PostgreSQL, Celery.
Healthcare patient data API
Developed a HIPAA-compliant FastAPI service for a telehealth startup. The API ingests patient records from 3 EHR systems and serves them to 200+ clinics. Achieved 99.9% uptime with sub-100ms response times. Tech stack: FastAPI, FHIR, PostgreSQL, Redis, AWS.
Fintech payment processing API
Created a PCI-DSS compliant FastAPI backend for a payment gateway. The API processes 10,000+ transactions per day with idempotency and retry logic. Reduced fraud chargebacks by 60% using real-time scoring. Tech stack: FastAPI, Stripe, Plaid, PostgreSQL, Kafka.
Ecommerce inventory sync API
Built a FastAPI service that syncs inventory across Shopify, Amazon, and 3PL warehouses. The API handles 1 million SKU updates per day with conflict resolution. Reduced overselling incidents by 95%. Tech stack: FastAPI, Shopify API, Amazon MWS, PostgreSQL, RabbitMQ.
Real estate MLS data API
Developed a FastAPI backend that ingests MLS listings from 50+ sources and serves them to a real estate platform. The API handles 2 million property records with full-text search. Reduced data latency from 24 hours to 5 minutes. Tech stack: FastAPI, Elasticsearch, PostgreSQL, Redis.
EdTech assessment scoring API
Built a FERPA-compliant FastAPI service for an online learning platform. The API scores 500,000+ student assessments per month using async processing. Reduced grading time from 3 days to 2 hours. Tech stack: FastAPI, PostgreSQL, Celery, AWS Lambda.
Why teams hire us.
Senior engineers only
Every FastAPI project at IRPR is built by a senior engineer with 8+ years of Python experience. No junior developers, no offshore teams. Your engineer has shipped 10+ FastAPI projects before yours.
Fixed price from $80K
You get a fixed price in week 2 during the Roadmap phase. No hourly billing, no surprise invoices. The price covers the entire build through production deployment.
12-week MVP delivery
We ship a production-ready FastAPI backend in 8-12 weeks. Your frontend team can start integrating endpoints after the first 3-week sprint. No waiting months for a working API.
Full code ownership
You own the source code, the CI/CD pipeline, and the infrastructure from day one. There is no vendor lock-in. You can take the code to any team or deploy anywhere.
Built-in compliance
We build FastAPI backends that meet HIPAA, PCI-DSS, and SOC 2 requirements. Your API includes audit logging, encryption at rest and in transit, and role-based access control.
Post-launch support included
Every project includes 30 days of post-launch support with a 2-hour average response time. We fix bugs, optimize queries, and help your team deploy updates.
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.