FastAPI Development ConsultantsDevelopment Consultants
We build production FastAPI backends in 8-12 weeks. Fixed price, no hourly billing, and full code ownership.
IRPR builds FastAPI backends for production apps. We use Python 3.12, Pydantic v2 for validation, SQLAlchemy 2.0 for ORM, and Celery for async tasks.
Every project ships with a working API, CI/CD pipeline on GitHub Actions, and Sentry error monitoring. Timeline is 8-12 weeks. Fixed price ranges from $80K to $250K. We support HIPAA, PCI-DSS, and SOC 2 compliance.
Founders who need a scalable API for their SaaS MVP. CTOs replacing a slow Django or Flask monolith. Product teams building microservices for fintech or healthcare. Engineering leads who want async-first APIs with automatic OpenAPI docs.
Types of software we ship.
REST API Backend
Production REST API with FastAPI. Auto-generated OpenAPI docs, JWT auth, and rate limiting via Redis.
GraphQL API
GraphQL gateway using Strawberry or Ariadne. Single endpoint with real-time subscriptions via WebSockets.
Microservices Platform
Event-driven microservices with FastAPI, RabbitMQ, and Docker Compose. Each service scales independently.
Real-Time Data API
WebSocket and SSE endpoints for live dashboards. Built with FastAPI, Redis Pub/Sub, and PostgreSQL LISTEN/NOTIFY.
Async ETL Pipeline
Data ingestion pipeline using FastAPI, Celery, and S3. Processes 10K+ records per second with retry logic.
Admin Dashboard Backend
Admin panel API with FastAPI, SQLAlchemy, and Alembic migrations. Role-based access control for 5+ roles.
Third-Party Integration API
Integration layer for Stripe, Salesforce, HubSpot. Uses FastAPI background tasks for webhook processing.
Serverless API
FastAPI deployed on AWS Lambda via Mangum. Cold starts under 200ms with provisioned concurrency.
We build for every business type.
SaaS platforms
Healthcare
Fintech
Ecommerce
Data platforms
Why FastAPI for Your Backend
FastAPI is the fastest Python web framework for building production APIs.
FastAPI handles 10,000+ requests per second on a single instance. It uses Pydantic v2 for automatic request validation and generates OpenAPI docs with zero extra code. Async endpoints mean your API doesn't block on database calls.
IRPR has shipped 40+ FastAPI projects since 2020. We use SQLAlchemy 2.0 for async ORM, Alembic for migrations, and Celery for background tasks. Every API includes health checks, structured logging, and Prometheus metrics.
Generic Dev Shop vs IRPR
Not all FastAPI consultants deliver the same quality. Here is the difference.
Generic dev shops quote hourly rates and change scope mid-project. They skip automated testing and deploy without CI/CD. Their APIs fail under load and have no monitoring.
IRPR delivers a fully tested FastAPI backend with CI/CD, Sentry monitoring, and 99.9% uptime SLA. We fix the price in week 2 and never charge for scope changes within the agreed spec.
- Hourly billing with no cap
- No automated tests
- No CI/CD pipeline
- No monitoring or alerts
- No OpenAPI docs
- Scope creep every week
- Fixed price from week 2
- 90%+ test coverage
- GitHub Actions CI/CD
- Sentry + Datadog monitoring
- Auto-generated OpenAPI docs
- Fixed scope with change control
Our FastAPI Development Process
We build your FastAPI backend in four phases over 8-12 weeks.
Phase 1 is the Roadmap. We define endpoints, data models, and auth strategy. You get a fixed price and timeline. Phase 2 is the Product build with weekly demos.
Phase 3 is Release. We deploy to AWS ECS or Lambda, set up monitoring, and run load tests. Phase 4 is Handoff. You get full source code, CI/CD pipeline, and documentation.
What Ships with Your FastAPI Backend
Every FastAPI project includes these deliverables by default.
You get a production-ready API with automated tests, CI/CD, and monitoring. No hidden extras. No surprise fees.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- Sentry error tracking
- Auto-generated OpenAPI docs (Swagger UI)
- 90%+ automated test coverage
- Docker Compose for local development
- Alembic database migrations
- Health check and readiness endpoints
- Prometheus metrics endpoint
- 30-day post-release warranty
What we ship in this practice.
SaaS Billing API
Built a subscription billing backend with FastAPI and Stripe. Handles 5,000+ concurrent users with 50ms response times. Reduced billing errors by 40%. Tech stack: FastAPI, Stripe API, PostgreSQL, Celery.
Healthcare Data Exchange
Created a HIPAA-compliant FastAPI backend for patient data exchange. Processes 10,000+ FHIR records daily. Achieved SOC 2 Type II certification. Tech stack: FastAPI, FHIR, PostgreSQL, AWS ECS.
Fintech Payment Gateway
Developed a PCI-DSS compliant FastAPI payment processing API. Handles 1,000+ transactions per second with 99.99% uptime. Reduced fraud by 25% using real-time scoring. Tech stack: FastAPI, Stripe, Redis, AWS Lambda.
Ecommerce Product API
Built a FastAPI product catalog API for a mid-market retailer. Supports 500,000+ SKUs with full-text search. Cut page load time from 3 seconds to 200ms. Tech stack: FastAPI, Elasticsearch, PostgreSQL, Redis.
Real-Time Analytics Dashboard
Created a WebSocket-based FastAPI backend for live analytics. Streams 10,000+ events per second to a React dashboard. Reduced report generation time from 5 minutes to 10 seconds. Tech stack: FastAPI, WebSockets, Redis, TimescaleDB.
ML Model Serving API
Built a FastAPI endpoint to serve a PyTorch recommendation model. Handles 5,000 requests per minute with 100ms latency. Increased recommendation click-through rate by 15%. Tech stack: FastAPI, PyTorch, Redis, Docker.
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, no scope creep charges.
Senior engineers only
Our team averages 10+ years of Python experience. Every engineer has shipped at least 5 production FastAPI backends. No juniors, no offshore outsourcing.
8-12 week MVP delivery
Most FastAPI backends ship in 8-12 weeks. We break the project into weekly sprints with working endpoints every Friday. You see progress, not promises.
Full code ownership
You own the entire codebase from day one. Source code, tests, CI/CD pipeline, and documentation are all in your GitHub repository. No licensing fees.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant FastAPI backends. Encryption at rest and in transit, audit logging, and role-based access control are standard.
99.9% uptime SLA
Every FastAPI API we deploy includes health checks, automated alerts, and a 99.9% uptime guarantee. We monitor with Sentry and Datadog 24/7.
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.