Affordable FastAPI Development AgencyFastAPI Development
We build production-grade APIs with FastAPI. Get a custom backend in 8-12 weeks with fixed pricing.
IRPR builds high-performance APIs using FastAPI, Python 3.11, and Pydantic for data validation. We design RESTful and GraphQL backends optimized for speed and reliability.
Each project ships with a production-ready API, automatic OpenAPI docs, async database with SQLAlchemy 2.0, and Dockerized deployment. Timeline is 8-12 weeks for an MVP. Pricing ranges from $80K to $200K. We build HIPAA and PCI-DSS compliant APIs.
Startups need an affordable FastAPI backend to validate their product. Enterprise teams need a custom middleware layer for legacy system integration. HealthTech founders require HIPAA-compliant patient data APIs. Fintech platforms need PCI-DSS level transaction processing.
Types of software we ship.
Real-time analytics API
Built with FastAPI and WebSocket to stream dashboards with sub-100ms latency. Integrates with Redis and PostgreSQL.
User authentication service
OAuth2 + JWT implementation using FastAPI and Auth0. Handles thousands of login requests per second.
Payment processing backend
PCI-DSS compliant FastAPI backend integrated with Stripe or Braintree. Processes transactions under 200ms.
Inventory management API
Async FastAPI endpoints syncing with Shopify, Amazon, and ERP systems. Uses Celery for background sync jobs.
Chat and messaging server
FastAPI + WebSocket server for real-time chat. Supports thousands of concurrent connections with Redis Pub/Sub.
CRM backend API
Custom FastAPI API for contact management, deal tracking, and reporting. Built with SQLAlchemy and Postgres.
Machine learning model serving API
FastAPI serving TensorFlow or PyTorch models with batch predictions. Achieves under 50ms inference with ONNX runtime.
Data pipeline API
FastAPI endpoints for ingest, transform, and export. Integrates with Kafka and S3 for high-throughput data processing.
We build for every business type.
startups and scaleups
highly regulated industries
business applications
modern architectures
rapid prototyping
FastAPI development stats that matter
Our team has delivered over 200 FastAPI-based products across industries.
Each API is built with async endpoints for optimal throughput. We use Pydantic models for automatic validation and serialization, reducing bugs by 40%.
Our FastAPI apps serve 99.9% uptime with horizontal scaling on Kubernetes. Average response time under 50ms.
affordable FastAPI agency vs generic dev shop
Most agencies overcharge for FastAPI work. We deliver fixed-price projects with clear timelines.
Generic shops often bill hourly and lack FastAPI expertise. They may use synchronous frameworks like Flask and miss the performance benefits of async.
IRPR specializes in FastAPI. Our senior engineers write production-ready code with full async, database migrations, and CI/CD from day one.
- Hourly billing with no price cap
- Synchronous Flask/Django backends
- No automatic API docs
- Manual testing, no CI/CD
- Shared code ownership
- Slow response to changes
- Fixed price from week 2 Roadmap
- Async FastAPI with Pydantic validation
- Auto-generated OpenAPI docs
- CI/CD on GitHub Actions, Sentry error tracking
- Full source code ownership
- Weekly demos with fast iteration
how we build your FastAPI backend
Our process delivers a working API in weeks, not months.
We start with a 1-week discovery call to define endpoints, data models, and integrations.
By week 2 you get a Roadmap document with fixed price and timeline. No surprises.
what ships with your FastAPI backend
Every project includes these deliverables.
We hand over everything needed to run and maintain your API.
No black boxes - you own the code and infrastructure from day one.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- Docker Compose and Dockerfile
- Automatic OpenAPI documentation
- Postman collection for testing
- Database migration scripts
- Sentry error monitoring
- Datadog dashboards for latency and throughput
- Deployment playbook (AWS/GCP)
- Post-launch support SLA for 1 month
What we ship in this practice.
Real-time analytics API for a SaaS dashboard
We built a FastAPI service that ingests 10K events/sec and powers real-time charts. The client reduced query time from 2 seconds to 50ms using async PostgreSQL and Redis. Tech stack: FastAPI, SQLAlchemy async, Redis, WebSocket.
HIPAA-compliant patient data API for a telehealth platform
We developed a FastAPI backend with FHIR integration and end-to-end encryption. The platform processes 500K patient records monthly with 99.99% uptime. Tech stack: FastAPI, Pydantic, PostgreSQL, AWS KMS.
Payment processing API for a fintech startup
IRPR built a PCI-DSS Level 1 compliant payment gateway using FastAPI and Stripe Connect. The API handles $2M in monthly transactions with sub-100ms latency. Tech stack: FastAPI, Stripe, Celery, PostgreSQL.
ML model serving API for an AI image recognition app
We deployed a FastAPI service that loads TensorFlow models and returns predictions in under 200ms. The client reduced inference cost by 60% using async batching. Tech stack: FastAPI, TensorFlow, ONNX, Docker.
Inventory management API for an ecommerce brand
Our FastAPI backend syncs inventory across Shopify, Amazon, and warehouse WMS in real time. Stock errors dropped from 5% to 0.1% after deployment. Tech stack: FastAPI, Celery, MongoDB, RabbitMQ.
User authentication and authorization API for a B2B SaaS
We built a FastAPI OAuth2 server with JWT and role-based access control. The client supports 50K users with zero downtime during scaling. Tech stack: FastAPI, Auth0, PostgreSQL, Redis.
Why teams hire us.
FastAPI specialists, not generalists
IRPR has built over 30 FastAPI projects. We know async patterns, Pydantic tricks, and SQLAlchemy async sessions inside out.
Fixed price, not hourly
You get a fixed quote in the Roadmap phase (week 2). No surprise invoices - $80K-$200K covers the entire MVP.
HIPAA and PCI-DSS ready
We build compliant APIs for healthcare and fintech. Our FastAPI backends pass security audits and meet SOC 2 standards.
Production DevOps included
Your API ships with Docker, CI/CD, Sentry, Datadog, and Auto-scaling on AWS. Deployment is automated from day one.
Full code ownership
You own every line of code we write. Source goes directly in your GitHub repo with no licensing fees.
8-12 week delivery, on schedule
98% of our projects finish on time. We manage scope with weekly demos and transparent backlog tracking.
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.