Leading FastAPI Development VendorDevelopment Vendor
We build high-performance APIs with FastAPI, Python 3.12, and PostgreSQL. Ship your MVP in 8-12 weeks with fixed pricing.
IRPR is a leading FastAPI development vendor specializing in high-performance APIs, microservices, and data pipelines. We use FastAPI with Python 3.12, Pydantic v2, SQLAlchemy, Redis, and Kafka to build systems that handle 10K+ requests per second.
Every project ships in 8-12 weeks for an MVP, with fixed pricing from $80K to $250K depending on complexity. Our backends are built to meet HIPAA, PCI-DSS, and SOC 2 compliance from day one.
We work with CTOs at fintech startups needing PCI-compliant payment APIs, SaaS founders building multi-tenant backends, healthcare platform teams requiring HIPAA-compliant data APIs, and ecommerce leaders who need high-throughput order processing.
Types of software we ship.
Real-time data streaming API
Build with FastAPI WebSockets and Kafka for low-latency event processing. Handles 10K+ messages per second.
Payment processing backend
Stripe-integrated FastAPI backend with PCI-DSS compliance. Supports subscriptions, invoices, and webhooks.
RESTful microservices gateway
FastAPI gateway with OAuth2, rate limiting, and circuit breakers using Redis and JWT authentication.
Data ingestion pipeline
Pydantic v2 schemas with async database sessions. Ingests CSV, JSON, and real-time streams into PostgreSQL.
Chatbot backend
FastAPI WebSockets with LangChain and OpenAI for real-time conversational agents. Handles 500 concurrent sessions.
SaaS multi-tenant API
PostgreSQL schema-per-tenant with JWT authentication and per-tenant rate limits. Ships with tenant management dashboard.
AI/ML inference API
FastAPI endpoints serving ONNX Runtime models with auto-scaling on AWS ECS. Handles 1000 requests per minute.
E-commerce order management API
FastAPI backend with Redis caching, Celery task queue, and Shopify integration. Processes 10K orders per hour.
We build for every business type.
Fintech
Healthcare
SaaS
Ecommerce
Data & Media
Why choose a leading FastAPI development vendor
IRPR has shipped 200+ custom APIs using FastAPI across every industry, with a 98% on-time delivery rate.
We do not reuse templates. Every FastAPI backend is designed from scratch to match your data model, security requirements, and performance needs. Our engineers average 12+ years of experience and have built APIs for companies handling millions of users.
New York-based startups and Fortune 500 firms alike trust IRPR for FastAPI development because we deliver production-ready code with CI/CD, monitoring, and compliance documentation included.
What sets IRPR apart from generic dev shops
Most firms rehash templates. We build fast, secure, scalable APIs from the ground up.
A generic dev shop may deliver a Flask API in 16 weeks with no compliance or CI/CD. IRPR delivers a FastAPI backend in 12 weeks with Pydantic validation, Docker, GitHub Actions, and a full security audit.
Our clients save an average of 30% on total project cost because we avoid rework. Our fixed pricing model means no budget surprises.
- Uses outdated frameworks like Flask
- No compliance expertise
- Hourly billing
- Late delivery by months
- No CI/CD pipeline
- No post-launch support
- FastAPI with Python 3.12 and Pydantic v2
- HIPAA, PCI, SOC 2 compliant
- Fixed price from Roadmap phase
- 98% on-time delivery
- CI/CD on GitHub Actions with Docker
- 60-day warranty and monitoring
How we build your FastAPI backend
Our process is designed to reduce risk and accelerate delivery.
We follow a four-phase approach: Architecture Workshop, MVP Sprint, Security & Compliance Audit, and Deployment & Handoff. Each phase has clear deliverables and milestones.
You see progress every week via a live staging environment. Changes are made in Git branches and reviewed within 24 hours.
What ships with every FastAPI project
Every API we build comes with a production-ready stack and full documentation.
From day one, you have a repeatable deployment pipeline, monitoring, and auto-generated API docs. No extra fees for infrastructure setup.
- Source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions
- PostgreSQL database schema with Alembic migrations
- Redis cache layer for high-throughput endpoints
- Docker Compose setup for local development
- Sentry error monitoring
- Pydantic v2 validation schemas
- OpenAPI 3.1 documentation automatically generated
- Load testing results with Locust
- Deployment scripts for AWS ECS or GCP Cloud Run
What we ship in this practice.
Real-time payment webhook API
Built with FastAPI, Stripe, Redis, and Celery. The client reduced webhook processing time from 2 seconds to 120 milliseconds while handling 5,000 transactions per hour.
HIPAA-compliant patient data API
FastAPI backend with SQLAlchemy, AWS KMS, and JWT authentication. The telehealth platform passed a HIPAA audit in 6 weeks and now serves 50,000 patients.
Multi-tenant SaaS backend
FastAPI with PostgreSQL schema-per-tenant, OAuth2, and rate limiting. Launched with 50 tenants in month 1 and scaled to 500 within 6 months.
AI content generation API
FastAPI with OpenAI, LangChain, and async queues. Handles 1,000 requests per minute with 99.9% uptime for a marketing platform serving global brands.
E-commerce order management API
FastAPI with Stripe, Shopify integration, and Redis caching. Reduced order processing from 3 days to 30 minutes for a New York-based retail chain.
Real-time data pipeline
FastAPI with Kafka, PostgreSQL, and WebSockets. Ingested 1 million events per day with sub-100ms latency for a logistics company tracking shipments.
Why teams hire us.
Fixed price, not hourly
Every FastAPI project gets a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices. You know the total cost upfront.
Senior FastAPI engineers only
Our team averages 12+ years experience. Every engineer has shipped production FastAPI APIs handling 10K+ requests per second.
Built-in compliance
We deliver FastAPI backends that meet HIPAA, PCI-DSS, and SOC 2 standards from day one. No rework needed for audits.
12-week MVP delivery
From idea to production in 12 weeks. Our fastest FastAPI MVP shipped in 8 weeks for a travel startup. Average is 10 weeks.
Full code ownership
You own every line of code. No royalties, no vendor lock-in. We hand over the GitHub repo, CI/CD pipeline, and deployment scripts.
60-day warranty
After launch, we provide 60 days of monitoring, bug fixes, and performance tuning. We do not disappear after deployment.
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.