Best FastAPI Development ConsultantsFastAPI Consultants
We build production-grade APIs with FastAPI in 8-12 weeks. Fixed price, senior engineers, full code ownership.
IRPR builds FastAPI backends for web apps, mobile apps, and microservices. We use FastAPI for its async speed, automatic OpenAPI docs, and Pydantic validation. Every project ships with a PostgreSQL database, Redis caching, and Docker containers.
A typical FastAPI MVP ships in 8-12 weeks with a fixed price of $80K-$250K. We handle authentication, rate limiting, background tasks, and CI/CD pipelines. Our APIs serve 99.9% uptime on AWS or GCP.
Founders hire us to validate a SaaS idea with a working API. CTOs hire us to replace a slow Django or Flask backend. Product teams hire us to build a microservice for a new feature. All get senior engineers who write tests from day one.
Types of software we ship.
REST API Development
Build a RESTful API with FastAPI, SQLAlchemy, and Alembic for database migrations. Includes JWT auth and Swagger docs.
Microservices Architecture
Design and deploy independent FastAPI services connected via RabbitMQ or Kafka. Each service scales separately.
GraphQL API Development
Wrap FastAPI with Strawberry or Graphene for GraphQL endpoints. Supports subscriptions and batch queries.
Async WebSocket Server
Build real-time features with FastAPI WebSockets. Used for live chat, notifications, and data streaming.
API Gateway & Proxy
Create a FastAPI gateway that routes requests to multiple backend services. Handles auth, logging, and rate limits.
Data Pipeline API
FastAPI endpoints that trigger ETL jobs via Celery or Prefect. Ingest data from S3, process with Pandas, return results.
Third-Party Integration API
Wrap external APIs (Stripe, HubSpot, Salesforce) behind a FastAPI facade. Normalizes responses and caches calls.
Admin Dashboard API
FastAPI back-end for internal admin panels. Includes role-based access, audit logs, and export endpoints.
We build for every business type.
SaaS platforms
healthcare
fintech
ecommerce
real estate
Why the best FastAPI development consultants use async Python
FastAPI is the fastest Python web framework for building APIs. Our senior engineers use it to deliver high-performance backends.
FastAPI is built on Starlette and Pydantic. It handles 50,000 requests per second on a single server. Automatic OpenAPI docs mean your frontend team can start integrating immediately. No separate documentation tool needed.
IRPR has shipped 200+ products using FastAPI. We use async endpoints for I/O-bound tasks like database queries and external API calls. This reduces response times by 60% compared to synchronous Flask apps. Every API includes typed responses and validation errors in JSON.
Generic dev shops vs the best FastAPI development consultants
Not all agencies build FastAPI correctly. Here is what separates IRPR from a generic shop.
A generic dev shop might promise FastAPI but deliver a slow, synchronous API with no tests. They often use Flask-style patterns that break FastAPI's async model. You end up with an API that crashes under load and has no documentation.
IRPR assigns senior Python engineers who have built 50+ FastAPI projects. We write async code from the start. Every endpoint has unit tests, integration tests, and load tests. We ship with a CI/CD pipeline that runs tests on every push.
- Uses synchronous code with async decorators
- No automated tests for endpoints
- Manual deployment with SSH and copy-paste
- No rate limiting or caching
- No OpenAPI spec customization
- Hourly billing with no cap
- Full async code with proper await patterns
- 100% test coverage on API endpoints
- CI/CD with GitHub Actions and Docker
- Redis caching and rate limiting built in
- Custom OpenAPI docs with examples
- Fixed price from the Roadmap phase
How we build your FastAPI project in 4 phases
Our process moves from idea to production API in 12 weeks or less. Each phase has a clear deliverable.
We follow a structured process that eliminates guesswork. Every phase ends with a review and sign-off. You see working code every 2 weeks.
The Roadmap phase locks the scope and price. No surprises during development.
What ships with every FastAPI project from IRPR
Every project includes a complete production-ready API. No missing pieces.
We do not hand you code and walk away. Every delivery includes deployment, monitoring, and documentation. Your team can take over immediately.
All code is in your GitHub repository from day one. You have full ownership and access.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Docker Compose for local development
- PostgreSQL database with Alembic migrations
- Redis cache for high-traffic endpoints
- Sentry error tracking and logging
- OpenAPI (Swagger) documentation
- Load test results with Locust
- Deployment playbook for AWS or GCP
- 1 hour of post-launch support
What we ship in this practice.
SaaS subscription API
Built a multi-tenant FastAPI backend with Stripe integration, user roles, and usage tracking. Reduced time-to-market from 6 months to 10 weeks. Tech stack: FastAPI, PostgreSQL, Redis, Stripe.
Healthcare patient portal API
Developed a HIPAA-compliant FastAPI service for managing patient records and appointment scheduling. Handles 10,000+ requests per day with 99.9% uptime. Tech stack: FastAPI, PostgreSQL, AWS KMS, Twilio.
Fintech payment processing API
Created a PCI-DSS compliant FastAPI microservice for processing credit card payments and refunds. Reduced payment failure rate by 15%. Tech stack: FastAPI, PostgreSQL, Stripe, Redis.
Ecommerce inventory sync API
Built a FastAPI service that syncs inventory across Shopify, Amazon, and warehouse systems in real time. Cut manual data entry by 20 hours per week. Tech stack: FastAPI, PostgreSQL, Celery, Shopify API.
Real estate MLS ingestion API
Developed a FastAPI pipeline that ingests 500,000+ MLS listings daily, normalizes data, and serves search endpoints. Reduced search latency by 40%. Tech stack: FastAPI, PostgreSQL, Elasticsearch, AWS S3.
EdTech assessment API
Built a FERPA-compliant FastAPI backend for online quiz delivery and grading. Supports 5,000 concurrent users during exam periods. Tech stack: FastAPI, PostgreSQL, Redis, WebSockets.
Why teams hire us.
Senior FastAPI engineers only
Every engineer on your project has 5+ years of Python experience and has shipped at least 10 FastAPI APIs. No junior developers, no offshore teams.
Fixed price, not hourly
We quote a fixed price during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
8-12 week MVP delivery
Your first working API ships in 8-12 weeks. We use proven patterns and reusable components to accelerate development.
Full code ownership
All source code, documentation, and infrastructure scripts are yours. No licensing fees, no lock-in, no recurring payments to us.
Production-ready from day one
Every API ships with CI/CD, monitoring, error tracking, and load testing. You can deploy to production on day 1 after handoff.
Compliance built in
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliant APIs. Our engineers know the security controls required for each 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.
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