FastAPI Development AgencyDevelopment Agency
We build high-performance APIs with FastAPI. Ship your MVP in 8-12 weeks with senior Python engineers.
IRPR builds production-grade APIs and microservices using FastAPI. We use async Python, Pydantic, and SQLAlchemy for fast, reliable backends.
We ship your product in 8-12 weeks with fixed pricing from $80K-$250K. Our APIs meet HIPAA, PCI-DSS, and SOC 2 compliance.
Who hires us: CTOs needing a scalable API backend, startup founders launching a SaaS MVP, product managers integrating third-party services, and enterprise teams modernizing legacy systems.
Types of software we ship.
REST API development
Build RESTful APIs with FastAPI for web and mobile apps. Includes OpenAPI docs, OAuth2, and rate limiting.
Microservices architecture
Design and deploy microservices with FastAPI, Docker, and Kubernetes. Each service runs independently with its own database.
Real-time data processing API
Handle streaming data with FastAPI and WebSockets. Use for live dashboards, chat, or IoT feeds.
Machine learning model serving
Deploy ML models via FastAPI endpoints. Integrate with TensorFlow, PyTorch, or scikit-learn for predictions.
GraphQL API development
Combine FastAPI with GraphQL using Strawberry or Ariadne. Flexible queries for complex data relationships.
E-commerce backend API
Build checkout, inventory, and payment APIs with FastAPI. Integrate Stripe, PayPal, and tax calculators.
Healthcare API (HIPAA)
Develop HIPAA-compliant APIs with FastAPI. Encrypt PHI, audit logs, and BAA agreements included.
Fintech payment API (PCI-DSS)
Create PCI-DSS compliant payment APIs with FastAPI. Tokenization, fraud detection, and 3D Secure support.
We build for every business type.
SaaS platforms
E-commerce
Healthcare
Fintech
Logistics and Travel
Why choose FastAPI for your backend?
FastAPI is the fastest Python web framework for building APIs.
FastAPI delivers 3x faster performance than Flask and Django REST Framework. It uses async Python to handle thousands of concurrent connections without blocking.
Our team has shipped 200+ products using FastAPI. We use Pydantic for data validation, SQLAlchemy for ORM, and Alembic for migrations. Every API includes auto-generated OpenAPI documentation.
Generic dev shop vs IRPR
Most agencies write slow, unmaintainable APIs. We build FastAPI backends that scale.
Generic shops use Flask or Django without async patterns. They deliver monolithic code with no testing or documentation.
IRPR uses FastAPI with async/await, dependency injection, and automatic validation. We include CI/CD pipelines, Sentry monitoring, and 100% test coverage.
- Uses Flask or Django REST
- No async support
- Manual validation and error handling
- No auto-generated docs
- Monolithic architecture
- No performance testing
- FastAPI with async/await
- Automatic validation with Pydantic
- Auto-generated OpenAPI docs
- Microservices or modular monolith
- CI/CD with GitHub Actions
- Load testing with Locust
Our FastAPI development process
We follow a 4-phase approach from idea to deployment.
Phase 1: Idea validation and technical roadmap. We map your API endpoints, data model, and third-party integrations.
Phase 2: Rapid prototyping. We build a working API within 2-3 weeks with basic endpoints and authentication.
What ships with your FastAPI project
Every deliverable includes these items.
We hand over full source code, documentation, and deployment scripts. No black boxes.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Auto-generated OpenAPI (Swagger) docs
- Docker Compose for local development
- PostgreSQL database with Alembic migrations
- Sentry error tracking and performance monitoring
- Load test scripts with Locust
- Deployment guide and runbook
- 30-day post-launch support
What we ship in this practice.
SaaS subscription management API
Built a multi-tenant FastAPI backend for a subscription analytics platform. Reduced API response time by 60% using async endpoints. Tech: FastAPI, PostgreSQL, Stripe, Redis.
Telemedicine patient portal API
Developed HIPAA-compliant FastAPI APIs for video consultations and EHR integration. Handled 10,000 concurrent users with 99.9% uptime. Tech: FastAPI, Twilio, PostgreSQL, AWS.
Payment gateway API
Created PCI-DSS compliant payment processing APIs with tokenization and fraud detection. Processed $50M in transactions in first year. Tech: FastAPI, Stripe, Plaid, PostgreSQL.
E-commerce inventory API
Built real-time inventory management APIs for a multi-warehouse retailer. Cut stock discrepancies by 90% with WebSocket updates. Tech: FastAPI, Redis, PostgreSQL, Shopify.
Real estate listing API
Developed MLS-integrated FastAPI APIs for a property search platform. Reduced data sync latency from 5 minutes to 10 seconds. Tech: FastAPI, Elasticsearch, PostgreSQL, Celery.
Logistics route optimization API
Built FastAPI microservices for fleet tracking and route planning. Saved client 15% on fuel costs through optimized routing. Tech: FastAPI, Google Maps API, PostgreSQL, Kafka.
Why teams hire us.
Fixed price, not hourly
Every FastAPI project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
We assign experienced Python engineers with 8+ years of backend development. No junior developers, no offshore outsourcing.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs from day one. Includes encryption, audit logging, and access controls.
8-12 week MVP delivery
Your first production-ready FastAPI API ships in 8-12 weeks. We follow agile sprints with bi-weekly demos.
Full code ownership
You own all source code, documentation, and deployment scripts. No proprietary frameworks, no licensing fees.
Post-launch support included
We provide 30 days of monitoring, bug fixes, and performance tuning after launch. Average response time for critical issues is under 2 hours.
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.