Senior FastAPI Development FirmSenior FastAPI
We build production-grade APIs with FastAPI. Ships in 12 weeks with fixed pricing.
IRPR is a senior FastAPI development firm. We build production-grade APIs with FastAPI, Python, Pydantic, SQLAlchemy, and PostgreSQL. Every project uses async endpoints, automatic OpenAPI docs, and type validation from day one.
Most FastAPI backends ship in 12-14 weeks. Pricing is fixed between $80K and $250K depending on complexity. We handle compliance for healthcare (HIPAA), fintech (PCI-DSS), and SaaS (SOC 2).
CTOs needing a scalable API for a new product hire us. Startups looking for a battle-tested FastAPI foundation hire us. Enterprise teams migrating from Flask or Django hire us. SaaS companies requiring high-performance multi-tenant APIs hire us.
Types of software we ship.
REST API Backend
Full CRUD REST API with FastAPI, SQLAlchemy ORM, and PostgreSQL. Includes pagination, filtering, and rate limiting.
GraphQL API
GraphQL gateway using Strawberry or Ariadne with FastAPI. Supports real-time subscriptions and federated schemas.
Microservices Architecture
Event-driven microservices with FastAPI, RabbitMQ or Kafka, Docker, and Kubernetes. Each service independently deployable.
Real-Time Data Pipeline
WebSocket-based real-time pipelines with FastAPI, Redis pub/sub, and Celery. Used for live dashboards and notifications.
API Gateway
Central API gateway using FastAPI with authentication, logging, and request transformation. Integrates with Kong or Traefik.
Third-Party API Integration
Unified integration layer for Stripe, HubSpot, Salesforce, Slack, and OpenAI. Retry logic and webhook handling built in.
Webhook System
Scalable webhook ingestion and delivery system using FastAPI, Redis queue, and signature verification. 99.9% delivery guarantee.
Internal Developer Portal
Self-service API portal with FastAPI backend, OpenAPI specs, and interactive docs for internal teams. Backstage integration available.
We build for every business type.
Fintech
Healthcare
Ecommerce
SaaS
Logistics
What a senior FastAPI development firm delivers
Every FastAPI project from IRPR ships with proven metrics from 200+ products.
Our FastAPI backends average 12 weeks from kickoff to production. You get a fixed price quote in the Roadmap phase (week 2). No hourly billing, no scope creep, no surprises.
We have shipped FastAPI projects for clients in 50+ countries. Our APIs run at 99.9% uptime with automated monitoring and CI/CD out of the box.
IRPR vs generic development shops
Not all FastAPI developers deliver the same quality. Here's how we differ.
Generic shops often assign junior developers or offshore teams to FastAPI projects. Timelines slip, code quality suffers, and you pay by the hour.
IRPR assigns senior engineers only. Every project has a fixed price and a hard deadline. We handle compliance, testing, and deployment from day one.
- assigns junior or mid-level developers
- hourly billing with no cap
- no fixed deadline
- no compliance expertise
- delivers incomplete documentation
- leaves deployment to you
- senior engineers only
- fixed price with no surprises
- 12-week delivery guarantee
- HIPAA, PCI-DSS, SOC 2 built in
- auto-generated OpenAPI docs
- CI/CD + monitoring included
How we build your FastAPI backend in 4 phases
Our process is designed to reduce risk and deliver a production-grade API fast.
Phase 1 (Idea): We map your requirements, data models, and endpoints in a 1-week discovery sprint. You get a detailed specification before any code is written.
Phase 4 (Release): Your API is deployed with CI/CD, monitoring, and automated tests. We hand over full source code and documentation.
What ships with every FastAPI project
Every deliverable includes production-ready artifacts, not just code.
We don't hand over a zip file and walk away. Every FastAPI backend ships with the full toolchain needed to run, monitor, and extend the API. Your engineers can take over immediately.
All source code is in your private GitHub repository with branch protection and automated checks. No black boxes. No proprietary frameworks.
- Source code in your GitHub/GitLab repo
- CI/CD pipeline on GitHub Actions or GitLab CI
- Automated test suite with pytest and coverage reports
- Auto-generated OpenAPI (Swagger) documentation
- Dockerized services with docker-compose and Dockerfile
- Database migrations with Alembic and SQLAlchemy
- Monitoring and error tracking via Sentry
- Deployment scripts for AWS or GCP with Terraform
- Load testing scripts with Locust or k6
- Security scan reports (Bandit, Safety) and dependency audit
What we ship in this practice.
Payment Processing API for Fintech Startup
Built a PCI-DSS compliant payment processing API with FastAPI, Stripe Connect, and PostgreSQL. Reduced transaction failure rate by 40% and enabled real-time reconciliation.
HIPAA-Compliant Patient Data API
Developed a FastAPI backend for a telehealth platform handling PHI. Integrated with Epic EHR using FHIR. Passed HIPAA audit on first try. Handles 50K patient records.
Multi-Tenant Ecommerce API
Created a FastAPI catalog and checkout API for a B2B marketplace serving 200+ suppliers. Uses PostgreSQL row-level security. Processes 10K orders per day with 99.9% uptime.
Real-Time Analytics API for SaaS
Delivered a FastAPI WebSocket pipeline for live user analytics. Built with Redis pub/sub and Celery. Reduced dashboard latency from 5 seconds to 200 milliseconds.
Route Optimization Engine for Logistics
Engineered a FastAPI microservice that computes optimal delivery routes using OSRM and Google Maps API. Cut fleet fuel costs by 15% and reduced delivery times by 25 minutes per route.
Media Content Distribution API
Built a FastAPI backend for a media company that ingests, transcodes, and serves video content. Integrated with AWS S3 and CloudFront. Handles 5 TB of daily uploads with automatic thumbnail generation.
Why teams hire us.
Fixed price, not hourly
Every FastAPI project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You pay exactly what you approved.
Senior engineers only
We employ no juniors. Every engineer has 7+ years of Python experience and has shipped FastAPI in production. Average team size is 3 senior engineers per project.
12-week delivery guarantee
From kickoff to deployment, your FastAPI backend ships in 12 weeks. 98% of our projects finish on time or early. We hold to the deadline because we plan for it.
Compliance built in, not bolted on
HIPAA, PCI-DSS, SOC 2, and FERPA are part of the architecture from day one. We use encryption at rest and in transit, audit logs, and role-based access controls by default.
Full code ownership
You own every line of code. No proprietary frameworks, no licensing fees. All source code, infrastructure-as-code, and CI/CD scripts are transferred to your repository at the end.
Async-first communication
We work async across time zones with daily standups via written updates. New York, London, Berlin, Singapore -- we overlap 4 hours every day for calls. No micromanagement.
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.