Senior FastAPI Development ConsultantsDevelopment Consultants
We build high-performance APIs and microservices with FastAPI. Ship production-ready backend systems in 8-12 weeks.
IRPR's senior FastAPI development consultants build APIs and backends for SaaS, fintech, and healthcare. We use FastAPI, Pydantic, SQLAlchemy, and async Python to deliver high-performance endpoints with automatic OpenAPI docs.
Every project ships in 8-12 weeks with a fixed price from $80K to $250K. We handle compliance (SOC 2, HIPAA, PCI-DSS) and include CI/CD, monitoring, and full ownership of your code.
We work with CTOs who need a production-grade API layer, founders launching a SaaS MVP that requires low-latency async endpoints, and engineering leads scaling a microservices architecture. FastAPI is our default for Python backends.
Types of software we ship.
REST API development
Build RESTful APIs with FastAPI, automatic validation via Pydantic, and async I/O for high throughput.
Microservices architecture
Break down monoliths into async microservices using FastAPI and RabbitMQ or Kafka for event-driven communication.
Real-time data pipelines
Build websocket-backed streaming APIs with FastAPI and Redis for real-time dashboards and live updates.
API integration services
Integrate third-party APIs (Stripe, Salesforce) using FastAPI's httpx with retry logic and error handling.
Backend for mobile apps
Optimized APIs for mobile with FastAPI, JWT auth, and efficient pagination for low-bandwidth clients.
SaaS backend development
Multi-tenant backends with FastAPI, PostgreSQL, and Alembic migrations, including tenant isolation.
GraphQL API development
Combine FastAPI with Strawberry for GraphQL endpoints with subscriptions and batch loading.
AI/ML API deployment
Deploy ML models behind FastAPI endpoints with async inference, batching, and model versioning.
We build for every business type.
SaaS
Fintech
Healthcare
Ecommerce
AI/ML
Why senior FastAPI consultants matter
When your API needs to handle thousands of requests per second, FastAPI is the right choice and our consultants have the experience to deliver.
FastAPI's async capabilities reduce latency by up to 60% compared to synchronous frameworks. Our senior consultants have shipped over 200 products using FastAPI, Python, and async SQLAlchemy.
We enforce production patterns from day one: dependency injection, background tasks, rate limiting, and structured logging with Sentry. Every API comes with auto-generated docs at /docs and /redoc.
Generic FastAPI dev shop vs IRPR
Not all FastAPI consultants are equal. See how IRPR differs.
Many dev shops write FastAPI without async patterns or proper error handling. They skip testing and deliver monolithic code that's hard to deploy.
IRPR's senior consultants write production-grade APIs with automated tests, CI/CD, and monitoring from day one. We own the delivery and stand behind the code.
- No async understanding
- Missing OpenAPI schema validation
- No background task management
- Zero load testing
- No CI/CD pipeline
- Single-developer bottleneck
- Deep async/await expertise
- Automatic Pydantic validation
- Celery or FastAPI background tasks
- Locust or k6 load testing
- GitHub Actions CI/CD
- Senior team of 3+ engineers
Our FastAPI development process
We follow a 4-phase process from idea to release.
Phase 1: Roadmap - We map out your API structure, endpoints, models, and data flow. You get a fixed price and timeline in week 2.
Phase 2: Build - Our senior consultants implement the API in FastAPI with async, Pydantic, and Alembic. Weekly demos show progress.
What ships with your FastAPI backend
Every project includes these deliverables by default.
Every FastAPI backend from IRPR comes with these deliverables by default. No extra cost, no hidden scope.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Deployment to AWS/GCP/Azure using Docker
- API documentation auto-generated at /docs
- Sentry error tracking and logging
- Unit tests with pytest (90%+ coverage)
- Load testing results with k6
- Alembic migration scripts for database
- Postman or Insomnia collection for testing
- One year of code support from the team
What we ship in this practice.
Real-time trading API for Fintech
Built a low-latency API for a stock trading platform using FastAPI, WebSockets, and Redis. Achieved sub-10ms response times for 50K concurrent users. Tech stack: FastAPI, Redis, PostgreSQL, Docker.
HIPAA-compliant patient portal backend
Developed a FastAPI backend for a telemedicine startup handling PHI. Implemented async endpoints, audit logging, and role-based access. Reduced patient data retrieval time by 40%. Stack: FastAPI, SQLAlchemy, Auth0, AWS.
Multi-tenant SaaS API for CRM
Designed and built a multi-tenant backend with FastAPI for a CRM platform. Each tenant gets isolated data and config. Shipped in 10 weeks with full test coverage. Stack: FastAPI, PostgreSQL, Celery, Stripe.
Real-time content moderation API
Created an async FastAPI service for an ecommerce platform to moderate user uploads. Integrated with AWS Rekognition and custom ML models. Reduced moderation latency from 5s to 300ms.
Inventory sync API for retail chain
Built a FastAPI-based sync service connecting 500+ retail stores to a central inventory system. Uses Kafka for event streaming and PostgreSQL for persistence. Cut inventory errors by 90%.
LLM-powered chat backend
Developed a FastAPI backend for an AI chatbot company, integrating with OpenAI and vector stores. Supports streaming responses and multi-turn conversations. Handles 1000+ concurrent sessions.
Why teams hire us.
Fixed price, no hourly billing
Every FastAPI project gets a fixed quote after our 2-week Roadmap. No hourly surprises. 98% of projects finish on time and on budget.
Senior-only team, no juniors
Our consultants have 10+ years each in Python and backend engineering. We never staff juniors on client projects. Average engineer tenure at IRPR is 6 years.
Full code ownership
You own every line of code we write. No licenses, no lock-in. We push to your GitHub from day one.
Production-ready from day one
We include CI/CD, monitoring, logging, and auto-docs in every FastAPI project. No afterthoughts. Your API is deployable at any milestone.
Compliance baked in
We've built FastAPI backends for HIPAA, PCI-DSS, and SOC 2 environments. We know the audit trails, encryption requirements, and access controls needed.
12-week delivery guarantee
Our standard FastAPI MVP ships in 8-12 weeks. We've done it over 200 times. If we're late, we discount the overage.
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.
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