Best FastAPI Development VendorFastAPI Development
We build production-ready APIs in 8-12 weeks. Fixed pricing from $80K.
IRPR builds production-grade FastAPI backends and APIs for startups and enterprises. We use FastAPI with Pydantic v2, SQLAlchemy, PostgreSQL, and Redis to deliver high-performance, async-ready services.
Every project ships with CI/CD, Docker containers, Sentry monitoring, and automatic OpenAPI documentation. Typical delivery is 8-12 weeks with fixed pricing between $80K and $250K. We comply with HIPAA, PCI-DSS, and SOC 2 standards when required.
Our clients are CTOs scaling their tech stack, engineering leads needing reliable API infrastructure, product managers launching MVP backends, and enterprise architects modernizing microservices. They choose IRPR as their best FastAPI development vendor for speed and quality.
Types of software we ship.
REST API Development
Build high-performance REST endpoints with automatic validation and OpenAPI docs. Uses FastAPI + Pydantic.
Microservices Backend
Design decoupled services communicating via RabbitMQ or Kafka. FastAPI async for low latency.
Real-Time WebSocket API
Deliver live updates with WebSockets, powered by FastAPI async handlers and Redis Pub/Sub.
Data Processing API
Handle async file uploads and background tasks with FastAPI + Celery. Process thousands of jobs per minute.
Third-Party Integration API
Connect FastAPI to Stripe, Salesforce, Twilio, or any REST/SOAP service. Managed webhooks included.
Authentication & Authorization Service
Implement OAuth2, JWT, or SAML authentication. FastAPI combined with Auth0 or custom SQLAlchemy stores.
File & Media Upload API
Build secure upload endpoints with AWS S3 storage and image processing via Pillow. FastAPI handles large files.
E-Commerce Backend API
Full checkout, inventory, and order management API. FastAPI with Stripe, MongoDB, and Redis caching.
We build for every business type.
SaaS Companies
Fintech
Healthcare
E-Commerce
Logistics & On-Demand
Why FastAPI for Your Backend
FastAPI gives you async performance and automatic docs out of the box.
FastAPI is the fastest Python web framework for building APIs, thanks to its async-native design and Starlette foundation. It automatically generates OpenAPI and Swagger documentation from your Pydantic models, saving hours of manual API docs work.
Compared to Flask or Django REST Framework, FastAPI benchmarks show 10x higher request throughput on identical hardware. It also supports dependency injection, background tasks, and WebSockets without extra libraries.
How IRPR vs Generic Dev Shops Differ
Most agencies bill hourly and cut corners. IRPR delivers fixed-price, production-ready FastAPI APIs.
Generic development shops often treat FastAPI as just another framework and lack deep async expertise. They deliver code without proper testing, CI/CD, or monitoring, leaving you to patch production issues.
IRPR is the best FastAPI development vendor because every lead engineer has 10+ years of Python experience. We ship with Docker, Sentry, load tests, and complete documentation from day one.
- Hourly billing leads to scope creep
- Little async or WebSocket experience
- No automatic OpenAPI standards
- Unclear timelines and missed deadlines
- DevOps and monitoring are extra cost
- Code ownership is questionable
- Fixed price from Day 1 after Roadmap
- Senior engineers with FastAPI production experience
- Automatic OpenAPI/Swagger docs every build
- 8-12 week delivery guarantee, 98% on-time
- CI/CD, Docker, Sentry included in every project
- Full code ownership with no lock-in
Our FastAPI Development Process
From API design to deployment, we follow a repeatable 4-phase approach.
We start with a 2-week Roadmap phase where we define the API contract, data models, and deployment architecture. Then we move into iterative development with weekly demos and continuous integration.
What Ships with Every FastAPI Project
You get more than just code. Every delivery includes the following.
Our goal is production readiness from the first deployment. That means everything needed to run, monitor, and extend your API is included by default.
- Source code in your GitHub repo
- CI/CD pipeline via GitHub Actions
- Automatic OpenAPI / Swagger docs
- Pydantic models for request validation
- PostgreSQL schema with Alembic migrations
- Sentry error and performance tracking
- Docker containers for dev, staging, prod
- Load testing results using Locust
- Deployment runbook with rollback steps
- Postman collection for all endpoints
What we ship in this practice.
Real-Time Order Tracking API for Food Delivery
Built a WebSocket-based order status API for a food delivery startup. Reduced order confirmation latency from 5 seconds to 200ms. Tech: FastAPI, Redis Pub/Sub, PostgreSQL, Docker.
HIPAA-Compliant Patient Data API for Telemedicine
Developed a FHIR-compliant patient records API for a telemedicine platform. Enabled secure data exchange across 3 EHR systems, saving 12 hours of manual entry per week. Tech: FastAPI, Pydantic v2, SQLAlchemy, AWS KMS.
Payment Processing Microservice for Fintech
Created a payment orchestration API that processes 10,000+ transactions per hour. Integrated with Stripe and Plaid for real-time bank validation. Reduced payment failures by 35%. Tech: FastAPI, Celery, PostgreSQL, Stripe.
Inventory Management API for E-Commerce
Built a unified inventory API syncing stock across 4 warehouses and a Shopify store. Cut stock-out incidents by 50%. Tech: FastAPI, Redis caching, PostgreSQL, RabbitMQ.
AI-Driven Content Moderation API
Designed a moderation API that classifies user-uploaded images with 98% accuracy using a fine-tuned ML model served via FastAPI. Handles 1,000 requests/sec. Tech: FastAPI, TensorFlow Serving, S3, Gunicorn.
Fleet Management WebSocket API for Logistics
Developed a real-time vehicle tracking API for a logistics company. Reduced driver idle time by 20% with live location updates every 2 seconds. Tech: FastAPI, WebSockets, PostgreSQL, Redis, Mapbox.
Why teams hire us.
Fixed Price, Not Hourly Billing
Every FastAPI project gets a fixed quote after the 2-week Roadmap phase. No surprise invoices — you know the cost upfront.
Senior Engineers Only
Our team averages 10+ years of Python experience. Every developer is a senior who has built multiple production FastAPI systems.
Production-Ready from Day One
We include CI/CD, Docker, Sentry, and load testing in every delivery. Your API goes live with monitoring and scalability built in.
Full Code Ownership
You own all source code and intellectual property. No lock-in, no licensing fees — your team can take over anytime.
8-12 Week Delivery Guarantee
We have a 98% on-time delivery rate for our FastAPI projects. Our fixed timeline means you can plan your launch with confidence.
Built for Compliance
We handle HIPAA, PCI-DSS, and SOC 2 compliance in our FastAPI backends. Data encryption, audit logs, and access controls are standard.
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.