best fastapi development partnerfastapi development
Your FastAPI partner ships in 8-12 weeks with fixed pricing. Senior Python engineers only, not junior contractors.
IRPR is a FastAPI development partner that builds production-grade APIs using Python, FastAPI, Pydantic, SQLAlchemy, and PostgreSQL. We handle async endpoints, background tasks with Celery, and OpenAPI documentation auto-generated from your models.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We support HIPAA, PCI-DSS, and SOC 2 compliance. Our CI/CD pipelines run on GitHub Actions with Sentry error tracking and Datadog monitoring.
Founders hire us to build their MVP and raise Series A. CTOs hire us to replace legacy Flask or Django APIs with FastAPI. Product managers hire us to add microservices to existing platforms. Enterprise architects hire us for PCI-DSS compliant payment APIs.
Types of software we ship.
REST API development
Build synchronous or async REST APIs with FastAPI, Pydantic models, and auto-generated Swagger docs. Deploy on AWS Lambda or ECS.
GraphQL API development
Wrap FastAPI with Strawberry GraphQL for flexible data queries. Integrates with Apollo Client and React frontends.
Microservices development
Build event-driven microservices with FastAPI, RabbitMQ, and Docker Compose. Scale each service independently.
Real-time API development
Add WebSocket support to FastAPI for real-time chat, live dashboards, and notifications using Redis Pub/Sub.
Payment API development
Build PCI-DSS Level 4 compliant payment APIs with FastAPI, Stripe Connect, or Braintree. Tokenize cards and handle webhooks.
Healthcare API development
Build HIPAA-compliant APIs with FastAPI for FHIR data exchange, patient portals, and EHR integrations.
Data pipeline API development
Build data ingestion APIs with FastAPI, Kafka, and Pandas. Process batches of 100K+ records with async endpoints.
AI/ML API development
Serve machine learning models behind FastAPI endpoints. Use MLflow for model versioning and Celery for async inference.
We build for every business type.
Fintech APIs
Healthcare APIs
E-commerce APIs
SaaS APIs
Logistics APIs
What your FastAPI development partner delivers in 12 weeks
IRPR ships production-ready APIs with code, docs, and infrastructure included.
Your FastAPI partner starts with a two-week Roadmap phase where we map out every endpoint, data model, and third-party integration. We audit your current stack and choose between SQLAlchemy, Tortoise-ORM, or Beanie based on your database - PostgreSQL, MongoDB, or DynamoDB.
After Roadmap approval, we build your API in 6-10 weeks with daily commits, automated tests at 90%+ coverage, and a deployed staging environment on AWS or GCP. You own the code from day one. We hand over the repo, CI/CD pipeline, and monitoring dashboards.
Generic dev shops vs. IRPR as your FastAPI partner
Not all FastAPI developers deliver production-ready APIs with security, scaling, and documentation built in.
Generic agencies write FastAPI endpoints that work locally but fail under load. They skip async patterns, ignore connection pooling, and never set up monitoring. You find out about performance issues when users complain.
IRPR builds FastAPI APIs with async database sessions, Redis caching, Sentry error tracking, and Datadog dashboards from sprint one. We load test every endpoint with Locust before deployment. Your API handles 10,000 concurrent requests without a timeout.
- writes synchronous endpoints
- no connection pooling
- no logging or monitoring
- manual deployment
- no load testing
- code drops without docs
- async endpoints with asyncio
- SQLAlchemy async sessions
- Sentry + Datadog from week 1
- CI/CD on GitHub Actions
- Locust load tests in staging
- OpenAPI docs auto-generated
How IRPR builds your FastAPI project in 4 phases
Every FastAPI engagement follows a repeatable process that eliminates surprises.
Phase 1 is the Roadmap phase (2 weeks, fixed price $5K-$10K). We document every endpoint, model, and integration. You approve before we write a line of production code. No scope creep.
Phase 2 is the Build phase (6-10 weeks). We ship daily commits, weekly demos, and automated tests. Phase 3 is the Release phase (1 week) with Sentry error monitoring, Datadog dashboards, and a deployment runbook. Phase 4 is the Handoff phase with source code, docs, and a 30-day warranty.
What ships with every FastAPI project from IRPR
Every FastAPI API includes the tools and dashboards you need to operate in production.
You get a private GitHub repo with commit history, all environment configuration, and a README that explains how to run locally and deploy. No proprietary tools. No black boxes.
We set up CI/CD on GitHub Actions that runs tests, lints, and deploys to a staging environment on every push. Production deployment is one approval away. Sentry alerts you on 500 errors before your users notice.
- Source code in your private GitHub repo
- Auto-generated OpenAPI (Swagger) docs
- CI/CD pipeline on GitHub Actions
- Sentry error tracking with alerts
- Datadog dashboards for latency and throughput
- Pydantic models with validation
- Async database sessions with SQLAlchemy
- JWT authentication with refresh tokens
- Docker Compose for local development
- Deployment runbook with rollback steps
What we ship in this practice.
Subscription billing API for SaaS
Built a FastAPI backend that handles 50,000 subscription events per day with Stripe webhooks, automatic invoicing, and dunning emails. Reduced payment failures by 15%. Tech stack: FastAPI, Celery, PostgreSQL, Stripe Connect.
Patient portal API for telemedicine
Built HIPAA-compliant FastAPI APIs for patient data exchange, video visit scheduling, and EHR integration. Reduced patient intake time by 8 hours per week per provider. Tech stack: FastAPI, FHIR, PostgreSQL, Twilio Video.
Loan origination API for fintech
Built a PCI-DSS Level 4 compliant API for loan applications, credit checks, and fund disbursement. Processed 5,000 applications per day with 99.9% uptime. Tech stack: FastAPI, MongoDB, Plaid, Alloy.
Real-time tracking API for logistics
Built a WebSocket-based FastAPI service for live package tracking, route optimization, and delivery notifications. Reduced delivery disputes by 20%. Tech stack: FastAPI, Redis, PostgreSQL, Google Maps API.
Multi-tenant API for e-commerce
Built a FastAPI backend for 50+ brands with shared database isolation, per-tenant caching, and custom webhook per tenant. Handled 10,000 products per tenant with sub-50ms response times. Tech stack: FastAPI, MySQL, Redis, RabbitMQ.
ML scoring API for insurance
Built a FastAPI service that serves a random forest model for risk scoring with < 100ms latency. Handled 20,000 requests per day with async inference via Celery. Tech stack: FastAPI, MLflow, PostgreSQL, Redis.
Why teams hire us.
Senior Python engineers only
Every FastAPI developer at IRPR has 5+ years of Python experience and has shipped at least 3 FastAPI projects. No junior developers. No outsourced teams. You talk directly to the engineer building your API.
Fixed price from the Roadmap
After the 2-week Roadmap phase, you get a fixed quote for the entire FastAPI build. No hourly billing. No scope creep. No surprise invoices. The price does not change unless you change the scope.
HIPAA and PCI-DSS compliant
We have built FastAPI APIs for healthcare clients that pass HIPAA audits and for fintech clients that pass PCI-DSS Level 4 assessments. We encrypt data at rest with AES-256 and in transit with TLS 1.3.
Production-ready from sprint one
Every FastAPI project ships with Sentry error tracking, Datadog dashboards, and CI/CD on GitHub Actions from the first sprint. Your staging environment is live in week 3. You see progress daily.
Full code ownership
You own every line of code from day one. No proprietary tools. No license fees. No lock-in. We hand over your private GitHub repo, Docker Compose file, and deployment runbook at the end of every engagement.
98% on-time delivery
We track every FastAPI project against a detailed roadmap with weekly milestones. Our track record: 98% of projects ship on or before the agreed timeline. If we miss a milestone, you know within 24 hours.
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.