Leading FastAPI Development ConsultantsDevelopment Consultants
We build production-grade APIs with FastAPI, Pydantic, and async Python. Ship your MVP in 8-12 weeks with a fixed price.
IRPR is a team of senior engineers who specialize in FastAPI development. We use FastAPI, Pydantic, SQLAlchemy, Alembic, Celery, and Redis to build APIs that handle thousands of requests per second with async concurrency.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance for HIPAA, PCI-DSS, SOC 2, and FERPA. You get full source code, CI/CD pipelines, and 99.9% uptime SLAs.
Startup CTOs hire us to build their first API product. Enterprise VP Engagements hire us to replace legacy Flask or Django monoliths. Product managers hire us to ship a SaaS MVP with Stripe integration and async background jobs.
Types of software we ship.
REST API development
Build stateless REST APIs with FastAPI, Pydantic models, and SQLAlchemy async sessions. Includes OpenAPI docs.
GraphQL API development
Expose GraphQL endpoints using Strawberry or Ariadne with FastAPI. Resolvers use async database queries.
Microservices architecture
Design and build decoupled microservices with FastAPI, RabbitMQ, and Docker. Each service has its own database.
Real-time API development
Add WebSocket endpoints for real-time features like chat, live dashboards, and notifications using FastAPI's built-in support.
Data pipeline API
Build ETL APIs that ingest, transform, and serve data using FastAPI, Celery, and PostgreSQL. Handle millions of records.
Third-party API integration
Integrate Stripe, Twilio, SendGrid, HubSpot, and Salesforce via FastAPI. Handle webhooks and rate limiting.
Admin dashboard API
Create admin APIs with role-based access control, audit logging, and export endpoints using FastAPI and SQLAlchemy.
Machine learning inference API
Serve ML models via FastAPI endpoints with async inference, model versioning, and GPU support using ONNX or TensorRT.
We build for every business type.
SaaS and startups
Healthcare and fintech
Ecommerce and logistics
Enterprise and internal tools
Media and content
Why choose IRPR for FastAPI consulting
Our FastAPI consultants have shipped over 200 products across 50 countries.
We use FastAPI, Pydantic, SQLAlchemy, and Alembic on every project. Our engineers write async endpoints, manage database migrations, and set up CI/CD pipelines with GitHub Actions. We deploy to AWS ECS or Kubernetes with 99.9% uptime.
Every project includes automated testing with pytest, async test fixtures, and load testing with Locust. We ship full documentation including OpenAPI specs and Postman collections. You own all code from day one.
Generic dev shop vs IRPR
Not all FastAPI consultants deliver the same quality. Here is the difference.
Generic shops often write synchronous code in FastAPI, miss proper dependency injection, and skip async database sessions. They deliver slow APIs with no documentation.
IRPR writes fully async endpoints, uses Pydantic for validation, and sets up Alembic migrations from day one. Every API includes OpenAPI docs, Sentry monitoring, and Datadog dashboards.
- Uses synchronous endpoints
- No dependency injection
- No async database sessions
- No automated tests
- No CI/CD pipeline
- No monitoring setup
- Fully async endpoints with FastAPI
- Pydantic models and dependency injection
- Async SQLAlchemy sessions
- pytest with 90%+ coverage
- GitHub Actions CI/CD
- Sentry + Datadog monitoring
Our FastAPI development process
We ship production-grade FastAPI APIs in 4 phases over 8-12 weeks.
Phase 1 is the Roadmap where we define endpoints, data models, and integrations. Phase 2 is development where we write all async code, set up databases, and configure CI/CD.
Phase 3 is product launch including load testing, security review, and documentation. Phase 4 is release with monitoring, alerts, and a 30-day warranty.
What ships with every FastAPI project
Every project delivers a complete, production-ready API system.
You get source code in your private GitHub repo, a CI/CD pipeline on GitHub Actions, and a staging environment on AWS. All infrastructure is defined as Terraform code.
We include Postman collections, OpenAPI specs, and a runbook for your operations team. No black boxes, no hidden dependencies.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Docker Compose for local development
- Terraform infrastructure as code
- OpenAPI 3.0 specification
- Postman collection with examples
- pytest suite with 90%+ coverage
- Sentry error tracking
- Datadog APM and dashboards
- Runbook for operations team
What we ship in this practice.
SaaS subscription API
Built a FastAPI backend with Stripe integration, async subscription management, and webhook handling. Reduced billing errors by 95%. Tech stack: FastAPI, SQLAlchemy, Stripe, Celery, Redis.
Healthcare patient portal API
Developed a HIPAA-compliant FastAPI API for patient data access, appointment scheduling, and secure messaging. Cut patient onboarding time from 3 days to 2 hours. Tech stack: FastAPI, PostgreSQL, Twilio, SendGrid.
Real-time logistics tracking API
Created WebSocket-based real-time tracking for a fleet of 500 delivery vehicles. Reduced customer support calls by 60%. Tech stack: FastAPI, WebSockets, Redis, PostgreSQL, Google Maps API.
Fintech payment processing API
Built a PCI-DSS compliant FastAPI API for payment authorization, settlement, and fraud detection. Processed $10M in transactions in the first month. Tech stack: FastAPI, Stripe, Plaid, PostgreSQL, Redis.
Ecommerce order management API
Developed a FastAPI backend for order creation, inventory sync, and shipment tracking across 3 warehouses. Cut order processing time from 4 hours to 15 minutes. Tech stack: FastAPI, SQLAlchemy, Celery, Shopify API.
EdTech content delivery API
Created a FERPA-compliant FastAPI API for course content delivery, student progress tracking, and assessment scoring. Supported 10,000 concurrent users. Tech stack: FastAPI, PostgreSQL, Redis, AWS S3.
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. You know the cost before we write a single line of code.
Senior engineers only
Our team has an average of 10+ years of Python experience. Every engineer has shipped at least 5 production FastAPI APIs. No junior developers, no outsourcing.
Async-first architecture
We use FastAPI's async capabilities, async SQLAlchemy sessions, and Celery for background tasks. Your API handles 10x more traffic than a synchronous equivalent.
Compliance built in
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliance into every FastAPI project. Audit logging, encryption, and access controls are not afterthoughts.
Full code ownership
You own every line of code from day one. No proprietary frameworks, no locked-in licenses. Your code runs on your infrastructure with your CI/CD pipeline.
30-day post-launch warranty
After launch we monitor your API for 30 days. We fix any bugs, optimize slow endpoints, and update documentation. No extra charges.
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.