Top FastAPI Development ServicesFastAPI Development
Build high-performance backends with FastAPI. IRPR delivers production-ready APIs in 12 weeks with fixed pricing.
IRPR offers top FastAPI development services for companies that need fast, reliable, and scalable backends. We use FastAPI with Python 3.11, Pydantic for validation, and SQLAlchemy for database access. Every API ships with automatic OpenAPI docs and async endpoints.
Our standard engagement delivers a production-grade FastAPI backend in 8-12 weeks. Pricing ranges from $80,000 to $250,000 depending on complexity and integrations. All projects include HIPAA, PCI-DSS, or SOC 2 compliance as needed.
Startups building their first MVP hire us to launch fast. SaaS companies hire us to replace legacy REST APIs with FastAPI. Fintech firms hire us for high-throughput trading platforms. Each buyer gets a dedicated senior engineer who writes all the code.
Types of software we ship.
API Backend (FastAPI microservices)
Async microservices with FastAPI, Redis for caching, and Docker containers. Each service is independently deployable.
SaaS Backend (FastAPI + Stripe)
Subscription billing, user management, and webhook handling. Built with FastAPI, Stripe API, and PostgreSQL.
Data API (FastAPI + Pandas)
High-performance endpoints for ETL pipelines and analytics dashboards. Uses Pandas, SQLAlchemy, and Redis.
Real-time API (FastAPI + WebSockets)
Live push notifications, chat, and collaborative features. Built on FastAPI with WebSocket support and Redis Pub/Sub.
AI Integration API (FastAPI + LangChain)
Connect ChatGPT, Claude, or custom LLMs via FastAPI endpoints. Uses LangChain, OpenAI SDK, and async processing.
Ecommerce Backend (FastAPI + Stripe)
Product catalog, cart, checkout, and inventory management. Integrates Stripe for payments and Algolia for search.
IoT Backend (FastAPI + MQTT)
Ingest telemetry from thousands of devices using FastAPI and MQTT brokers. Stores time-series data in InfluxDB.
Admin Dashboard API (FastAPI + Next.js)
RESTful endpoints for internal admin panels and reporting. FastAPI serves JSON to a Next.js frontend with JWT auth.
We build for every business type.
SaaS companies
Ecommerce brands
Fintech
Healthcare
Data and analytics
Top FastAPI Development Services for High-Performance Backends
IRPR ships FastAPI backends that handle thousands of requests per second with sub-50ms latency.
FastAPI gives you async performance and automatic validation. IRPR has built over 200 products using FastAPI since 2019. Our engineers have written more than 500,000 lines of production Python code. Every project includes Pydantic models, SQLAlchemy ORM, and OpenAPI documentation out of the box.
We integrate FastAPI with any database or cloud service. Typical stacks use PostgreSQL on AWS RDS, Redis on ElastiCache, and Docker on ECS. Our top FastAPI development services include load testing with Locust and monitoring with Sentry. Clients get 99.9% uptime SLAs.
How IRPR Delivers Top FastAPI Development Services Differently
Most agencies sell you hours. IRPR sells a complete, production-ready FastAPI backend with fixed pricing and full code ownership.
We have worked with over 100 clients in 50 countries. Every project follows our 4-phase framework: Idea, Roadmap, Product, Release. The Roadmap phase locks the scope and price in week 2. No scope creep, no hourly billing.
Our senior engineers have 10+ years of Python experience. They write async FastAPI code from day one. We use GitHub Actions for CI/CD, Docker for containers, and Terraform for infrastructure. Clients get a running deployment on day one, not after months.
- Hourly billing with vague estimates
- Junior developers with minimal FastAPI experience
- No documentation or only post-project docs
- Long timelines because of sync bottlenecks
- You own nothing; code stays with them
- No compliance help (HIPAA, PCI, SOC 2)
- Fixed price locked after 2-week Roadmap
- Senior engineers with 10+ years Python, FastAPI experts
- Auto-generated OpenAPI docs from day one
- Async-first code delivers 3x faster than sync alternatives
- Full code ownership in your GitHub repo from start
- Built-in compliance frameworks for HIPAA, PCI, SOC 2
Our FastAPI Development Process for Top-Tier Results
IRPR follows a proven 4-phase process to deliver top FastAPI development services on time and budget.
Each phase has clear deliverables. The Idea phase takes 1 week and produces a one-page product spec. The Roadmap phase takes 1 week and produces a detailed plan with fixed price. The Product phase takes 8-12 weeks and builds the API. The Release phase includes deployment, monitoring, and handover.
During the Product phase we write unit tests with pytest, integration tests with httpx, and load tests with Locust. Every FastAPI endpoint is tested for security with OWASP guidelines. We deploy staging environments on every pull request using GitHub Actions.
What Ships with Every Top FastAPI Development Service from IRPR
Every FastAPI project includes these 10 deliverables as standard.
No hidden extras. Every item is documented and tested before handover. Our clients get a complete production system they can run themselves from day one.
All code is written in Python 3.11+ with type hints. We use FastAPI, Pydantic, SQLAlchemy, and Alembic. The deployment uses Docker, ECS or Kubernetes, and CloudFront for CDN.
- Source code in your GitHub repository
- CI/CD pipeline using GitHub Actions
- Dockerized FastAPI application with docker-compose
- OpenAPI (Swagger) documentation auto-generated
- Pytest suite with 90%+ code coverage
- Sentry error monitoring and performance tracing
- HashiCorp Terraform for cloud infrastructure
- Database migrations with Alembic
- Production runbook with deployment steps
- 30-day post-release support with response SLA under 4 hours
What we ship in this practice.
SaaS Backend for Project Management
Built a FastAPI microservices backend for a project management SaaS. The API handles 500 requests/s with 30ms response times. Used FastAPI, PostgreSQL, Redis, and Stripe. Reduced manual billing errors by 90%.
Real-Time Analytics API
Designed an analytics API processing 50 million events/day. FastAPI with WebSockets delivers live dashboards. Stack includes FastAPI, ClickHouse, Redpanda, and Grafana. Latency under 10ms for 99th percentile.
Healthcare Patient API (HIPAA)
Developed a HIPAA-compliant FastAPI backend for a telemedicine platform. Handles PHI with encryption and audit logging. Uses FastAPI, PostgreSQL, and AWS KMS. Enabled 200+ providers to see patients remotely.
Ecommerce Checkout API
Built a high-availability checkout API for a subscription ecommerce brand. FastAPI with Stripe integration processes 10,000 orders/hour. Reduced abandoned carts by 35% through faster responses.
Fintech Payment Processing
Created a PCI-DSS compliant payment processing API. FastAPI handles transaction validation and fraud scoring. Tech stack: FastAPI, PostgreSQL, Stripe, and Redis. Processes $2 million in monthly transactions.
IoT Device Ingest API
Built an IoT backend ingesting telemetry from 50,000 devices. FastAPI with MQTT bridge and InfluxDB. Achieves 99.9% uptime with auto-scaling on AWS ECS. Reduced data loss to zero.
Why teams hire us.
Fixed Price, Not Hourly
Every project gets a fixed quote after the 2-week Roadmap phase. No hourly billing, no surprise invoices. You know the exact cost before we write a single line of FastAPI code.
Senior Engineers Only
Every engineer has 10+ years of Python experience and has built FastAPI backends for production. No juniors, no outsourcing. Your project is led by a senior engineer who stays the whole time.
Asynchronous First, Not After Thought
Every FastAPI endpoint is written with async/await from day one. This gives 3x higher throughput than sync code. No need to rewrite later when traffic grows.
Full Code Ownership from Start
Code lives in your GitHub repository from the first commit. You own everything. We never hold your code hostage. IRPR retains no IP rights.
Compliance Built In
We have delivered FastAPI backends for HIPAA, PCI-DSS, and SOC 2 environments. We include encryption, audit logging, and compliance documentation as part of the build, not an add-on.
12-Week Delivery Guarantee
Our top FastAPI development services ship a working backend in 12 weeks or less. We have a 98% on-time record across 200+ products. If we are late, you get a partial refund.
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.