Experienced FastAPI Development PartnerFastAPI
Build scalable APIs with a team that ships. 200+ products delivered. 8-12 week MVPs.
IRPR builds high-performance APIs using FastAPI. We combine Pydantic for validation, SQLAlchemy for ORM, and async Python for speed.
We ship production-ready FastAPI solutions in 8-12 weeks. Pricing ranges from $80K to $250K depending on complexity. All projects meet compliance like HIPAA or SOC 2.
Who hires us? CTOs needing a scalable API backend for their SaaS. Startup founders wanting a fast MVP with async Python. Enterprise teams requiring a dedicated API development partner for integrations. Product managers seeking to replace legacy APIs.
Types of software we ship.
Custom API Backend
Full-featured API for web or mobile apps using FastAPI with PostgreSQL and Redis.
Microservices Architecture
Split monolithic applications into FastAPI microservices with Docker and Kubernetes.
Real-time Data Streaming API
WebSocket-based real-time APIs using FastAPI and Redis Pub/Sub for live data.
AI/ML Model Serving API
Serve machine learning models as FastAPI endpoints with ONNX and TensorFlow.
E-commerce Checkout API
FastAPI checkout API with Stripe integration, cart management, and inventory sync.
Internal Tool API
CRUD APIs for internal dashboards using FastAPI, SQLAlchemy, and JWT authentication.
Third-Party Integration API
Connect Salesforce, HubSpot, and other systems via FastAPI webhooks and REST endpoints.
Authentication & Authorization API
OAuth2, JWT, and SAML-based authentication APIs built with FastAPI security utilities.
We build for every business type.
Fintech
Healthcare
SaaS
Ecommerce
Logistics
Why choose an experienced FastAPI development partner?
Building with FastAPI requires deep async Python knowledge and production experience.
FastAPI offers high performance but demands careful async design. IRPR has shipped 200+ Python backends using FastAPI, Pydantic, and async SQLAlchemy. Our team knows the pitfalls: connection pooling, async context managers, and database migrations.
We deliver APIs that scale from zero to thousands of requests per second. Every project includes automated load testing and async optimization. Clients get a production-ready system with CI/CD, monitoring, and documentation.
What you get with IRPR as your FastAPI partner
Compare our approach to generic dev shops.
Many agencies bill by the hour and use junior developers. IRPR offers fixed pricing and senior engineers only. Our process reduces risk and speeds delivery.
We include CI/CD, monitoring, and documentation in every project. You own the code from day one. No hidden fees.
- Hourly billing with no price cap
- Unclear timelines, often delayed
- Junior developers with little FastAPI experience
- No automated testing or CI/CD
- No monitoring or error tracking
- No post-launch support
- Fixed price from Roadmap phase (week 2)
- 8-12 week guaranteed delivery
- Senior engineers with 5+ years Python experience
- Automated testing and CI/CD on GitHub Actions
- Sentry error tracking and PagerDuty alerts
- 30-day post-launch support included
How we build your FastAPI backend in 12 weeks
Our four-phase process ensures predictable delivery.
IRPR uses a structured framework: Idea, Roadmap, Product, Release. Each phase has clear deliverables and milestones.
You see progress weekly. No black boxes.
What ships with every FastAPI project
Every deliverable includes these essentials.
No surprises. All code and infrastructure is yours.
- Source code in your private GitHub repo
- CI/CD pipeline on GitHub Actions with tests
- Sentry error tracking and performance monitoring
- Pydantic validation models for all endpoints
- OpenAPI (Swagger) documentation auto-generated
- Load testing results using Locust or k6
- Postman collection for API testing
- Deployment playbook for AWS (ECS or Lambda)
- Grafana dashboard with request metrics
- 30-day post-launch support with SLA
What we ship in this practice.
Payment Processing API for a fintech startup
Built a FastAPI async payment gateway that reduced transaction latency by 40%. Handled 1000+ requests per second with zero downtime in first 6 months. Tech stack: FastAPI, Pydantic, Stripe, Redis, PostgreSQL.
Patient Data API for a telehealth platform
Developed HIPAA-compliant API for patient records. Integrated with FHIR standards and encrypted all PHI. Reduced doctor admin time by 2 hours per day. Tech stack: FastAPI, SQLAlchemy, AWS KMS, PostgreSQL.
Real-time Analytics API for a SaaS product
Created a WebSocket-driven analytics API serving 10k concurrent connections. Delivered real-time dashboard updates with sub-200ms latency. Tech stack: FastAPI, Redis Pub/Sub, WebSockets, PostgreSQL.
Order Management API for an e-commerce brand
Replaced legacy SOAP API with FastAPI REST endpoints. Cut order processing time from 3 seconds to 200ms. Improved inventory sync speed by 80%. Tech stack: FastAPI, Kafka, MongoDB, Stripe.
Fleet Tracking API for a logistics company
Built a real-time GPS tracking API using FastAPI and MQTT. Integrated with partner carriers and reduced driver dispatch time by 30%. Tech stack: FastAPI, MQTT, TimescaleDB, Redis.
Content Delivery API for a media platform
Architected a high-throughput content API serving 1M+ daily requests. Implemented Redis caching and CloudFront CDN. Reduced origin load by 70%. Tech stack: FastAPI, Redis, CloudFront, PostgreSQL.
Why teams hire us.
Fixed Price from Day One
Every FastAPI project receives a fixed quote after the 2-week Roadmap phase. No hourly billing, no surprise invoices. Clients have paid the quoted amount on every project.
Senior Engineers Only
Our team averages 8+ years of Python and API development experience. We do not outsource to juniors. Every developer knows async Python, FastAPI internals, and database optimization.
12-Week Delivery Guarantee
We ship your FastAPI MVP in 8-12 weeks. If we miss the deadline, we provide two additional weeks of support at no cost. 98% of projects finish on time.
Full Code Ownership
You receive 100% ownership of all source code, documentation, and deployment scripts. No licensing, no rev share. IRPR keeps no rights to your IP.
CI/CD and Monitoring Included
Every project ships with GitHub Actions CI/CD, Sentry error tracking, and Grafana dashboards. Your team can deploy with confidence from day one.
30-Day Post-Launch Support
After deployment, we provide 30 days of bug fixes and performance tuning. Includes a dedicated Slack channel and 4-hour response SLA.
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.