Senior FastAPI Development CompanyDevelopment Company
Hire senior FastAPI engineers who ship production-grade APIs in 8-12 weeks. Fixed pricing, full ownership, no hidden fees.
IRPR builds production-grade APIs and microservices using FastAPI. We use Pydantic for data validation, SQLAlchemy for ORM, and async PostgreSQL for high-throughput systems.
Every project ships with full source code, CI/CD pipelines, and API documentation via OpenAPI. Timelines range from 8 to 12 weeks for an MVP, with fixed pricing between $80K and $250K. We build for compliance standards like HIPAA, PCI-DSS, and SOC 2.
We are hired by CTOs who need a senior backend team without hiring overhead, startup founders building data-intensive platforms, and enterprise architects migrating legacy systems to async Python. Also by product managers launching B2B SaaS with strict performance requirements.
Types of software we ship.
FastAPI REST API Development
Build RESTful APIs with automatic OpenAPI docs, input validation via Pydantic, and async database access. Integrates with Stripe, Twilio, or any third-party service.
FastAPI Microservices
Decouple your system into independent async services. Each microservice runs in its own Docker container, communicates via RabbitMQ or Kafka, and scales independently.
FastAPI GraphQL API
Combine FastAPI with Strawberry or Ariadne for GraphQL endpoints. Real-time subscriptions via WebSockets, perfect for live dashboards and chat apps.
FastAPI WebSocket Server
Build real-time WebSocket servers for live updates, notifications, or gaming backends. Handles thousands of concurrent connections with async tasks.
FastAPI Data Pipeline API
Create APIs that ingest, transform, and serve large datasets. Uses async streaming, Redis caching, and connection pooling for high throughput.
FastAPI Authentication Service
Implement OAuth2, JWT, or SAML-based authentication. Supports social login, multi-factor authentication, and role-based access control.
FastAPI Admin Dashboard Backend
Build the backend for admin panels with fast search, filtering, and bulk operations. Uses PostgreSQL full-text search and Elasticsearch for indexing.
FastAPI Serverless API
Deploy FastAPI on AWS Lambda or Google Cloud Run. Zero server management, auto-scaling, and pay-per-request pricing. Ideal for event-driven workloads.
We build for every business type.
SaaS platforms
Data-intensive applications
Ecommerce and marketplaces
Enterprise integrations
AI and ML services
Why senior FastAPI developers matter
FastAPI's async capabilities require deep Python expertise to avoid common pitfalls.
A junior developer might use synchronous code inside async routes, blocking the event loop and degrading performance. That does not happen with IRPR's senior engineers. We write fully async code with proper await patterns and connection pooling.
Our team has built over 200 FastAPI projects across healthcare, fintech, and SaaS. We know how to optimize database queries, handle rate limiting, and configure async workers for maximum throughput.
Hiring a senior FastAPI development company vs a generic dev shop
Not all agencies understand async Python and type safety.
Generic shops often cut corners on async patterns, leading to buggy and slow APIs. They may skip type hints and automated documentation, making maintenance harder.
IRPR's senior engineers follow best practices from day one. We write fully typed, async code with automated tests, CI/CD, and monitoring. The result is a production-ready API that scales.
- Uses synchronous code in async routes
- No type hints or Pydantic models
- No automated API documentation
- Poor error handling and logging
- No CI/CD or containerization
- Hourly billing with scope creep
- All routes are async with proper await patterns
- Full Pydantic models for validation and serialization
- OpenAPI docs generated automatically
- Structured error responses with Sentry monitoring
- CI/CD pipelines on GitHub Actions, Docker containers
- Fixed price from Roadmap phase, no surprises
Our process for building your FastAPI application
We follow a structured 4-phase approach to ship production-grade APIs.
Every project starts with a 2-week Roadmap where we define the API architecture, data models, and endpoints. You get a fixed price and timeline before any code is written.
Development then proceeds in sprints with weekly demos. We deploy to a staging environment for your team to test. Final deployment and handoff includes full documentation and a runbook.
What you get when you hire IRPR for FastAPI development
Every project ships with these deliverables.
- Source code in your private GitHub repository
- CI/CD pipeline using GitHub Actions
- Dockerized application with docker-compose
- OpenAPI 3.0 documentation
- PostgreSQL schema migrations with Alembic
- Sentry error tracking and performance monitoring
- Unit tests with pytest (80%+ coverage)
- Load test results with Locust
- Deployment guide and runbook
- 30 days of post-launch support
What we ship in this practice.
Real-time analytics dashboard for a fintech startup
Built a FastAPI backend that ingests 10,000 transactions per second and serves live dashboards. Reduced query latency by 60% using async PostgreSQL and Redis caching. Tech stack: FastAPI, PostgreSQL, Redis, WebSockets.
Multi-tenant CRM API for a SaaS company
Designed a RESTful API with tenant isolation using PostgreSQL schemas. Onboarded 50 new tenants in the first month with zero performance degradation. Tech stack: FastAPI, SQLAlchemy, Pydantic, Stripe.
Ecommerce order processing system
Replaced a legacy synchronous order system with async FastAPI microservices. Cut order processing time from 30 seconds to under 2 seconds. Tech stack: FastAPI, RabbitMQ, PostgreSQL, Docker.
Healthcare data exchange API
Built a HIPAA-compliant API for exchanging patient records between clinics. Handles 500,000 requests daily with 99.99% uptime. Tech stack: FastAPI, PostgreSQL, Alembic, AWS KMS.
IoT device management platform
Developed a WebSocket server for real-time device telemetry. Manages 100,000 concurrent connections with sub-100ms latency. Tech stack: FastAPI, WebSockets, MQTT, InfluxDB.
AI chatbot backend for customer support
Created an async API that routes user queries to GPT-4 and retrieves context from a vector database. Reduced average response time from 5 seconds to 800ms. Tech stack: FastAPI, OpenAI, Pinecone, Redis.
Why teams hire us.
Senior engineers only, no juniors
Our team averages 10+ years of Python experience. Every engineer has shipped production FastAPI systems handling millions of requests. No code is written by interns.
Fixed price from day one
We define the scope in a 2-week Roadmap phase and lock the price. No hourly billing, no surprise invoices. 98% of our projects finish on budget.
Full code ownership
You get the entire source code, database schemas, and infrastructure config. No black boxes, no proprietary frameworks. You can take it anywhere.
Production-grade from the start
Every API ships with automated tests, CI/CD pipelines, and monitoring. We use Sentry, Grafana, and Prometheus to ensure 99.9% uptime in production.
Compliance built in
We have built HIPAA-compliant APIs for healthcare, PCI-DSS for fintech, and SOC 2 for SaaS. Our code passes security audits without remediation.
8-12 week MVPs
Most projects go from idea to production in under 12 weeks. We use async FastAPI to build fast and iterate quickly. 200+ products shipped this way.
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.