Premium FastAPI Development CompanyFastAPI Development
We build high-performance async APIs with FastAPI. Ship your backend in 8-12 weeks with a fixed price.
IRPR builds premium FastAPI backends for startups and enterprises. We use FastAPI's async capabilities, Pydantic validation, and SQLAlchemy to deliver APIs that handle thousands of requests per second. Every project includes automated testing, CI/CD, and OpenAPI documentation.
We ship a production-ready FastAPI MVP in 8-12 weeks. Pricing is fixed after the Roadmap phase and ranges from $80K to $250K depending on complexity. All code is yours, with compliance for HIPAA, PCI-DSS, or SOC 2 built in from day one.
Our clients are CTOs scaling their platform, startup founders launching an API-first product, enterprise teams modernizing legacy backends, and product managers who need a reliable, high-performance backend without hiring a full in-house team.
Types of software we ship.
REST API Backend
CRUD endpoints with async database access, rate limiting, and JWT auth. Built with FastAPI, SQLAlchemy, and PostgreSQL.
GraphQL API
Flexible query layer using Strawberry GraphQL on FastAPI. Supports subscriptions for real-time data.
Real-Time WebSocket Server
Bi-directional event streaming for chat, live dashboards, and notifications. Uses FastAPI WebSockets and Redis Pub/Sub.
Async Microservices
Decoupled services communicating via message queues. Built with FastAPI, RabbitMQ, and Docker Compose.
Data Processing Pipeline
ETL pipelines with async workers. Uses FastAPI for ingestion, Celery for tasks, and S3 for storage.
AI/ML Model Serving
Low-latency inference endpoints for trained models. FastAPI with ONNX Runtime, TensorFlow Serving, and Docker.
E-Commerce Backend
Order management, inventory, and payment integration. FastAPI, Stripe, Redis cache, and PostgreSQL.
SaaS API Platform
Multi-tenant APIs with usage tracking, billing, and webhooks. FastAPI, Stripe, SQLAlchemy, and Alembic migrations.
We build for every business type.
SaaS
Fintech
Healthcare
E-Commerce
Data & ML
Why IRPR for FastAPI Development
We have shipped over 200 products using FastAPI, with senior engineers who know async Python inside out.
FastAPI is the fastest-growing Python web framework for building APIs. It automatically generates OpenAPI docs, validates data with Pydantic, and handles async requests without blocking. IRPR has been using FastAPI since version 0.45, and we have contributed to the ecosystem with open-source middleware and deployment patterns.
Every FastAPI project at IRPR starts with a two-week Roadmap phase where we define the data model, endpoints, and deployment architecture. You get a fixed price and a delivery schedule before a single line of code is written. No surprises, no scope creep.
IRPR vs Generic Dev Shops
Not all development teams understand async Python and FastAPI internals. Here is how we differ.
Many agencies treat FastAPI like Flask with type hints. They miss async context managers, dependency injection, and background tasks. IRPR builds production-grade FastAPI backends that use every framework feature correctly.
We also integrate compliance from day one. If you need HIPAA, we configure encryption at rest and in transit, audit logging, and access controls. If you need PCI-DSS, we isolate card data with tokenization. These are not afterthoughts.
- No dedicated FastAPI expertise
- Hourly billing leads to budget overruns
- Synchronous code in async endpoints
- No automated load testing
- Manual deployment with SSH
- No compliance knowledge
- Senior engineers with 5+ years in async Python
- Fixed price after Roadmap phase
- 100% async endpoints with proper connection pooling
- Automated CI/CD with GitHub Actions and pytest
- Docker + Kubernetes deployment with health checks
- HIPAA, PCI-DSS, SOC 2 compliance built in
Our FastAPI Development Process
We follow a four-phase process that de-risks your project from idea to production.
Every FastAPI project begins with a two-week Roadmap phase. We map out all endpoints, data models, third-party integrations, and deployment architecture. You receive a detailed specification and a fixed price before any coding starts.
During the Build phase, we work in two-week sprints with continuous delivery. You see a running API after the first sprint. We add authentication, rate limiting, caching, and monitoring as we go.
What Ships With Every FastAPI Project
Every deliverable includes these components by default. No hidden extras.
We believe in shipping production-ready code, not prototypes. Every FastAPI backend we deliver is ready to handle real traffic from day one.
Your team gets complete ownership of the codebase, infrastructure as code, and monitoring dashboards. You can deploy, modify, and scale without locking into IRPR.
- Source code in your private GitHub repository
- CI/CD pipeline with GitHub Actions and pytest
- Sentry error tracking and performance monitoring
- Docker Compose for local development
- Kubernetes manifests for production deployment
- OpenAPI (Swagger) documentation auto-generated
- Unit tests with 90%+ coverage
- Load testing script using Locust
- Database migration scripts with Alembic
- Health check endpoints and Prometheus metrics
What we ship in this practice.
Real-Time Chat API
Built a WebSocket-based chat backend handling 10,000 concurrent connections. Used FastAPI, Redis Pub/Sub, and PostgreSQL. Reduced message latency to under 50ms. Industry: SaaS.
Payment Processing Microservice
Developed a PCI-DSS compliant payment API that processes 500 transactions per second. Integrated with Stripe and Plaid. FastAPI, Celery, and AWS RDS. Industry: Fintech.
HIPAA-Compliant Patient Portal
Created a FastAPI backend for a telemedicine platform with 200+ providers. Handles PHI with encryption and audit logs. FastAPI, SQLAlchemy, and AWS KMS. Industry: Healthcare.
ML Model Serving Endpoint
Deployed a TensorFlow image classifier as a FastAPI endpoint. Achieved 200ms inference time with ONNX Runtime. Supports 1000 requests per minute. Industry: Data/ML.
E-Commerce Order API
Built a multi-tenant order management system for a dropshipping platform. Integrated with Shopify, Stripe, and ShipStation. FastAPI, Redis cache, and PostgreSQL. Reduced order processing time by 60%. Industry: E-Commerce.
SaaS Subscription Billing API
Developed a usage-based billing API with Stripe webhooks and metered pricing. Handles 50,000 active subscriptions. FastAPI, Celery, and TimescaleDB. Industry: SaaS.
Why teams hire us.
Fixed price, not hourly
Every FastAPI project gets a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Every developer on your project has 5+ years of Python experience and has shipped at least 3 production FastAPI backends. No juniors, no offshore teams.
8-12 week delivery
We ship a production-ready FastAPI MVP in 8-12 weeks. 98% of our projects finish on time because we scope tightly and build in two-week sprints.
Full code ownership
You own all source code, documentation, and infrastructure scripts. No licenses, no lock-in. You can take the code to any team after we deliver.
Compliance built-in
We configure HIPAA, PCI-DSS, or SOC 2 controls from day one. Encryption, audit logs, access controls, and vulnerability scanning are part of every build.
Async-first architecture
We use FastAPI's async capabilities to handle thousands of concurrent connections without blocking. Your API scales horizontally with minimal latency.
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.