Expert FastAPI Development VendorDevelopment Vendor
We build production-grade FastAPI backends in 8-12 weeks. Fixed price, senior engineers, no scope creep.
IRPR is an expert FastAPI development vendor. We build high-performance APIs, microservices, and backend systems using FastAPI, Pydantic, SQLAlchemy, and async Python. Every project uses Python 3.11, type hints, and OpenAPI documentation by default.
We ship production-ready FastAPI backends in 8-12 weeks with fixed pricing from $80K to $250K. All code is fully owned by you. We handle compliance for HIPAA, PCI-DSS, and SOC 2. Our team includes senior engineers with 10+ years of Python experience.
CTOs hire us when their in-house team lacks FastAPI depth. Startup founders hire us to build MVPs that scale to 10K+ requests per second. Enterprise architects hire us to migrate legacy Django or Flask apps to FastAPI for 3x better performance.
Types of software we ship.
RESTful API backend
FastAPI endpoints with automatic OpenAPI docs, JWT auth, rate limiting, and PostgreSQL. Handles 10K+ requests per second.
Microservices platform
Decoupled FastAPI services with RabbitMQ, Redis caching, and Docker Compose. Each service deploys independently.
Real-time data pipeline
FastAPI with WebSocket support, Kafka streaming, and async database writes. Processes 50K events per second.
GraphQL API gateway
FastAPI with Strawberry GraphQL, DataLoader for batching, and Apollo federation. Single endpoint for multiple services.
Machine learning inference API
FastAPI serving TensorFlow or PyTorch models with ONNX runtime. Sub-50ms latency per prediction.
WebSocket chat server
FastAPI WebSocket endpoints with Redis pub/sub, user presence tracking, and message history in PostgreSQL.
Background job processor
FastAPI with Celery workers, Redis broker, and task scheduling. Handles 100K+ jobs per day.
Admin dashboard backend
FastAPI with SQLAdmin, role-based access control, and audit logging. Export reports to CSV or PDF.
We build for every business type.
SaaS platforms
Fintech
Healthcare
Ecommerce
Logistics
Why choose IRPR as your FastAPI development vendor
We have shipped 200+ FastAPI-powered backends across 50 countries with 98% on-time delivery.
Our senior engineers average 12 years of Python experience. Each FastAPI project starts with a 2-week Roadmap phase where we define endpoints, data models, and async workflows. You get a fixed price and a clear timeline before any code is written.
We deploy on AWS ECS with auto-scaling, achieve 99.9% uptime, and integrate Sentry error tracking from day one. Every API ships with OpenAPI documentation, automated tests (pytest with 90%+ coverage), and CI/CD via GitHub Actions.
Generic dev shops vs IRPR as your FastAPI vendor
Not all FastAPI development vendors deliver production-ready, scalable APIs.
Many agencies write synchronous FastAPI code, skip type hints, and deploy without CI/CD. Their APIs break under load and lack proper error handling. You end up with technical debt and missed deadlines.
IRPR builds async-first FastAPI backends with Pydantic v2 validation, SQLAlchemy 2.0 async sessions, and Alembic migrations. We deploy on AWS with auto-scaling, load testing, and 24/7 monitoring. Every project includes a 30-day warranty.
- Synchronous code, no async/await
- No type hints or Pydantic schemas
- No CI/CD pipeline
- No load testing
- No error monitoring
- Hourly billing with scope creep
- Async FastAPI with asyncpg and httpx
- Full Pydantic v2 validation
- GitHub Actions CI/CD
- Locust load testing at 10K RPS
- Sentry error tracking
- Fixed price, no surprises
Our FastAPI development process
From idea to production in 8-12 weeks with fixed pricing.
We follow a 4-phase process: Idea, Roadmap, Product, Release. The Roadmap phase (week 2) delivers a detailed API specification, data model diagram, and fixed price contract. No guesswork.
During the Product phase, we build and test in 2-week sprints. You see working endpoints every sprint. The Release phase includes deployment, documentation, and a 30-day warranty.
What ships with every FastAPI project
Every backend includes these deliverables by default.
We ship production-ready code that you can deploy, maintain, and extend. No black boxes. No proprietary frameworks. Everything is in your GitHub repository from day one.
Our FastAPI backends include automated tests, CI/CD pipelines, and monitoring. You get a fully documented API that your frontend team can start using immediately.
- Source code in your private GitHub repo
- FastAPI application with async endpoints
- Pydantic v2 schemas with validation
- SQLAlchemy 2.0 async ORM with migrations
- OpenAPI 3.1 documentation (auto-generated)
- CI/CD pipeline with GitHub Actions
- Docker Compose for local development
- Sentry error monitoring
- Locust load testing scripts
- Deployment guide and runbook
What we ship in this practice.
Multi-tenant SaaS backend
Built a FastAPI backend for a B2B SaaS platform serving 500+ tenants. Used SQLAlchemy async sessions with schema-per-tenant isolation. Achieved 99.9% uptime and reduced API response time by 60% compared to the previous Django REST backend. Tech stack: FastAPI, PostgreSQL, Redis, AWS ECS.
Real-time payment processing API
Developed a FastAPI payment gateway for a fintech startup processing $2M monthly. Used WebSocket for transaction status updates and integrated Stripe Connect. Reduced payment confirmation time from 5 seconds to 200ms. Tech stack: FastAPI, Stripe, WebSocket, PostgreSQL.
HIPAA-compliant patient portal backend
Built a FastAPI backend for a telemedicine platform serving 10K patients. Implemented FHIR API endpoints, encrypted PHI storage, and audit logging. Passed HIPAA audit on first submission. Tech stack: FastAPI, FHIR, PostgreSQL, AWS KMS.
Ecommerce product catalog API
Created a FastAPI product catalog for an ecommerce brand with 50K SKUs. Used Elasticsearch for full-text search and Redis for caching product data. Reduced page load time by 70%. Tech stack: FastAPI, Elasticsearch, Redis, PostgreSQL.
Real-time fleet tracking backend
Developed a FastAPI WebSocket server for a logistics company tracking 2000 vehicles. Used Kafka for event streaming and PostgreSQL for trip history. Reduced ETA calculation time from 30 seconds to 1 second. Tech stack: FastAPI, Kafka, WebSocket, PostgreSQL.
ML model inference API
Built a FastAPI inference API for a computer vision startup serving 100K predictions per day. Used ONNX runtime with TensorFlow models. Achieved 45ms average latency per prediction. Tech stack: FastAPI, ONNX, TensorFlow, AWS Lambda.
Why teams hire us.
Senior engineers only
Every FastAPI project is staffed with engineers who have 10+ years of Python experience. No junior developers. No offshore teams. You work directly with the person writing your code.
Fixed price, not hourly
You get a fixed price after the 2-week Roadmap phase. No hourly billing. No surprise invoices. If we need more time, we cover the cost. We have delivered 98% of projects on time.
Production-ready from day one
Every FastAPI backend ships with CI/CD, automated tests, Sentry monitoring, and Docker Compose. You can deploy to production on day one. No technical debt to clean up later.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant FastAPI backends. We handle encryption, audit logging, and access controls. Our healthcare clients pass audits on first attempt.
Async-first architecture
All FastAPI endpoints use async/await with asyncpg and httpx. We handle 10K+ concurrent connections without blocking. Your API scales without rewriting.
30-day warranty
After launch, we provide 30 days of free support. We fix bugs, optimize queries, and help your team take over. No additional charges. No handoff headaches.
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.