Expert FastAPI Development ServicesExpert FastAPI
We build high-performance async APIs with FastAPI and Python 3.12. Get a scalable backend that handles 10,000+ requests per second in 12-14 weeks.
IRPR builds expert FastAPI development services for companies that need fast, reliable, and scalable async APIs. We use FastAPI, Pydantic, SQLAlchemy 2.0, and Celery to create backends that process thousands of requests with sub-50ms latency.
Every project ships with a fully documented API, automated tests (pytest, coverage >90%), CI/CD pipelines (GitHub Actions), and Docker containers. Typical timeline is 12-14 weeks for an MVP, with fixed pricing from $80K to $250K. We build to compliance standards like HIPAA, PCI-DSS, and SOC 2.
Startups needing API-first products hire us to launch faster. Enterprises moving from Flask or Django hire us for performance and async capabilities. Fintech and healthcare companies hire us for secure, audit-ready backends.
Types of software we ship.
RESTful API development
Build standard REST endpoints with full OpenAPI docs, request validation, and versioning. Integrates with Stripe, Twilio, or any third-party API.
Real-time data processing APIs
Handle live data streams using WebSockets and Redis Pub/Sub. Used for chat apps, live dashboards, and event-driven systems.
Microservices architecture
Decompose monoliths into small, independent services communicating via FastAPI, gRPC, or message queues (RabbitMQ, Kafka).
Async task scheduler APIs
Offload heavy jobs to Celery workers with Redis as broker. Schedule recurring tasks like email digests, report generation, or data sync.
API gateway services
Centralize authentication, rate limiting, and routing for multiple backend services. Built with FastAPI and Traefik or NGINX.
Data ingestion pipelines
Accept high-volume data from IoT devices, sensors, or external feeds. Process and store in PostgreSQL or TimescaleDB with automatic partitioning.
Authentication & authorization systems
Implement OAuth2, JWT, or SAML with role-based access control (RBAC). Works with Auth0, Keycloak, or custom identity providers.
Serverless API backends
Deploy FastAPI on AWS Lambda or Google Cloud Run for auto-scaling, pay-per-request solutions. Includes cold start optimization.
We build for every business type.
startups
enterprise
fintech
healthcare
data-driven platforms
Why expert FastAPI development matters for your next project
FastAPI is the fastest growing Python web framework, but building a production-grade API requires deep async expertise.
IRPR has shipped over 200 products, many relying on FastAPI for high-throughput backends. Our engineers have 10+ years of Python experience and contribute to open-source projects like Pydantic and Starlette.
We use FastAPI for its native async support, automatic OpenAPI docs, and Pydantic validation. This reduces boilerplate by 40% compared to Flask and gives your frontend team ready-to-use endpoint documentation.
FastAPI development: the IRPR difference
Most agencies build generic REST endpoints. IRPR builds production-ready, async, secure APIs out of the box.
We start every project with a detailed Roadmap document (week 2) that defines every endpoint, data model, and integration point. This eliminates scope creep and gives you a fixed price from day one.
Every delivery includes automated performance tests (locust or k6) that verify your API handles peak load before it goes live.
- Uses Flask/Django for everything
- No async support, blocks on I/O
- No automated load testing
- Hourly billing, scope creep common
- APIs have no rate limiting or auth
- No compliance documentation
- Specializes in FastAPI and async Python
- Full async with asyncio and Uvicorn
- Performance tests with locust in CI/CD
- Fixed price from Roadmap phase
- Built-in JWT, rate limiting, CORS
- HIPAA/PCI-DSS audit-ready systems
Our expert FastAPI development process
From idea to production in 12-14 weeks, with clear milestones and zero surprises.
The process starts with a 1-week kickoff to align on goals and tech decisions. By week 2 you have a complete roadmap with all endpoints defined.
We ship code every 2 weeks in production-ready increments. You see working features and can test them on a staging environment from week 3 onwards.
What ships with every expert FastAPI development project
Every delivery includes more than just code. You get the full infrastructure to run, monitor, and scale your API.
Our standard delivery package ensures your team can take over immediately. All code is in your repo from day one, and documentation is auto-generated from OpenAPI specs.
Sentry error tracking, Datadog or Prometheus monitoring, and a health check endpoint are included so you know when something breaks.
- Source code in your GitHub/GitLab repo
- CI/CD pipeline with GitHub Actions (lint, test, deploy)
- Automated API tests with >90% code coverage
- Sentry error tracking configured
- Prometheus + Grafana metrics dashboard
- Docker Compose for local development
- Kubernetes Helm charts for production (if needed)
- Postman / Bruno collection for all endpoints
- OpenAPI 3.1 spec with interactive docs
- Security scan report (Bandit, OWASP ZAP)
What we ship in this practice.
Real-time analytics API for e-commerce
Built a FastAPI backend that ingests clickstream data from 50,000 users per minute, processes with Celery, and serves real-time dashboards via WebSockets. Reduced page load time by 60%. Stack: FastAPI, Redis, Celery, PostgreSQL.
HIPAA-compliant telemedicine platform
Developed a FastAPI API for video visits, prescription management, and EHR integration. Achieved HIPAA compliance with audit logging, encryption, and RBAC. Handles 10,000 concurrent patients. Stack: FastAPI, Pydantic, PostgreSQL, AWS KMS.
Fraud detection API for fintech
Created a low-latency FastAPI service that scores transactions in under 10ms using ML models deployed on AWS SageMaker. Processed 1 million transactions daily with 99.99% uptime. Stack: FastAPI, Redis, RabbitMQ, scikit-learn.
B2B SaaS integration API
Built a unified API gateway that connects Salesforce, HubSpot, and Stripe for a CRM platform. Reduced integration time for new partners from 8 weeks to 2 weeks. Stack: FastAPI, Traefik, OAuth2, Celery.
IoT data ingestion platform
Developed a FastAPI API that ingests sensor data from 100,000 devices, validates and stores in TimescaleDB. Supports real-time alerts via WebSockets. Stack: FastAPI, MQTT bridge, InfluxDB, Kafka.
Educational API for adaptive learning
Created a FastAPI backend that personalizes learning paths for 500,000 students using collaborative filtering. Cuts content load time by 50%. Stack: FastAPI, Redis, PostgreSQL, TensorFlow Serving.
Why teams hire us.
Fixed price from day one
Every project gets a detailed Roadmap in week 2 with a fixed quote. No hourly billing, no surprise invoices. If we discover new requirements during development, we add them as a separate scoped change.
Senior Python engineers only
Every team member has 10+ years of Python experience. Many have contributed to FastAPI ecosystem projects like Pydantic and Starlette. You get engineers, not juniors.
Asynchronous by design
We build all I/O-bound operations with asyncio and Uvicorn workers. Your API handles thousands of concurrent connections without thread pool limits. Benchmark: 12K req/s on a single $50/month instance.
Compliance built-in
We bake HIPAA, PCI-DSS, and SOC 2 requirements into the architecture from day one. Encrypted at rest and in transit, audit logs, role-based access. We pass vendor security reviews fast.
Full code ownership
You own all source code, documentation, and infrastructure configuration. No lock-in. We even transfer CI/CD pipelines and deploy scripts so you can manage everything yourself.
Launch in 12 weeks
Our average MVP timeline is 8-12 weeks. You get a production-ready API with monitoring, documentation, and automated tests. No scope creep, no delays.
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.