Senior Python Backend Development AgencyDevelopment Agency
We build production-grade Python backends with senior engineers only. Fixed price, 8-12 week MVPs for SaaS, fintech, and data-heavy products.
IRPR is a senior-only Python backend development agency. We use Django, FastAPI, Celery, Redis, and PostgreSQL to build APIs, microservices, and data pipelines for production systems.
Every project ships in 8-12 weeks with fixed pricing between $80K and $250K. We design for compliance standards including HIPAA, PCI-DSS, and SOC 2 from day one.
We work with CTOs scaling a SaaS backend, startup founders launching a fintech MVP, product managers automating data workflows, and engineering leads migrating legacy Python monoliths.
Types of software we ship.
Custom REST/GraphQL API
Scalable APIs with Django REST Framework or FastAPI. Includes rate limiting, versioning, and OpenAPI documentation.
Microservices Architecture
Decoupled services using Docker, Kubernetes, and message queues like RabbitMQ. Enables independent scaling and deployment.
Data Pipeline & ETL
Batch and streaming data pipelines with Apache Airflow, Kafka, or Celery. Processes millions of records daily.
Real-Time Websocket Backend
WebSocket and SSE backends using FastAPI or Django Channels. Supports live dashboards, chat, and collaborative editing.
Authentication & Authorization
OAuth2, JWT, and session-based auth with role-based access control. Integrates with Auth0, Okta, or custom providers.
Payment Processing Backend
Stripe, Braintree, or Adyen integration with idempotent webhooks, invoicing, and subscription management.
Machine Learning Model Serving
REST APIs serving scikit-learn, TensorFlow, or PyTorch models. Includes A/B testing and model versioning.
Serverless Backend (AWS Lambda)
Event-driven functions with AWS Lambda, API Gateway, and DynamoDB. Reduces operational overhead for low-traffic features.
We build for every business type.
SaaS companies
Fintech
Healthcare
Ecommerce
Data-heavy businesses
Why you need a senior Python backend development agency
Building a production-grade Python backend requires deep experience with async, concurrency, and database optimization.
Junior developers often introduce slow queries, race conditions, and insufficient error handling. A senior team designs for scale from the start using connection pooling, caching layers, and proper indexing.
IRPR's engineers have built backends processing 10,000+ requests per second. We apply patterns like CQRS, event sourcing, and bulkheads to keep your system reliable under load.
Generic dev shop vs IRPR
Most agencies send junior or mid-level developers. We don't.
Generic shops assign whomever is available, leading to inconsistent code quality and missed deadlines. Their hourly billing model encourages slow work.
IRPR assigns a dedicated senior team that stays on your project through launch. Our fixed price ensures we finish on time, not on hours.
- Junior and mid-level engineers assigned to your project
- Hourly billing with no fixed scope
- No dedicated QA or DevOps
- Handoff after code delivery, no ongoing support
- Tech debt accumulates from rushed timelines
- No compliance experience (HIPAA, SOC2)
- Senior engineers only (7+ years average)
- Fixed price set in Roadmap phase (week 2)
- Built-in QA and DevOps in every sprint
- Production monitoring and 30-day post-launch support
- Clean architecture with code reviews and CI/CD
- HIPAA, PCI-DSS, SOC2 compliance built into design
How we build a senior-level Python backend for your product
Our process ensures predictable timelines, clean code, and a running MVP at week 12.
We start with a Discovery Call to understand your product goals, users, and data model. Within two weeks you get a fixed price and a detailed sprint plan.
During the build, you see working features every two weeks. We deploy to a staging environment and run automated tests before merging any code.
What ships with your Python backend
You own all code and infrastructure from day one. No black boxes.
Every project includes these deliverables as part of the fixed price.
- Source code in your private GitHub repo
- CI/CD pipeline using GitHub Actions
- Dockerized development environment
- Sentry error tracking integrated
- Datadog monitoring dashboard
- PostgreSQL database with migrations
- RESTful API documentation (OpenAPI/Swagger)
- Unit tests with pytest (90%+ coverage)
- Deployment playbook for AWS or GCP
- 30-day post-launch support and bug fixes
What we ship in this practice.
Real-time analytics dashboard for ad tech
Built a Python FastAPI backend processing 500K events/min with Redis caching and PostgreSQL. Reduced dashboard load time from 8s to 1.2s. Tech: FastAPI, Redis, PostgreSQL, AWS ECS.
HIPAA-compliant patient portal backend
Developed Django REST API for a telemedicine platform handling 10K patient records. Achieved HIPAA compliance with encrypted storage and audit logging. Tech: Django, PostgreSQL, AWS RDS, Celery.
Subscription billing system for SaaS
Created a Python backend with Stripe integration for a subscription platform. Automated invoicing and webhook handling, reducing billing errors by 40%. Tech: Django, Stripe, Celery, Redis.
ETL pipeline for logistics company
Built a data pipeline using Python and Apache Airflow to process 2M shipment records daily. Cut manual data entry by 8 hours/week. Tech: Airflow, Python, PostgreSQL, AWS S3.
Payment gateway for fintech
Designed a PCI-DSS compliant backend processing $5M in transactions monthly with 99.99% uptime. Tech: FastAPI, PostgreSQL, AWS Fargate, Stripe Connect.
Inventory management API for ecommerce
Developed a Python backend for a multi-warehouse inventory system. Reduced stockouts by 30% using real-time sync with Shopify and ERP. Tech: Django REST, PostgreSQL, Redis, Celery.
Why teams hire us.
Senior engineers only, no junior padding
All our Python developers have 7+ years of backend experience. You never get a junior assigned to your project.
Fixed price from week 2
Our Roadmap phase (week 2) produces a fixed price contract. No hourly billing, no surprise scope creep charges.
Built-in DevOps and QA
Every sprint includes automated tests, CI/CD pipelines, and staging environments. Our QA team reviews every PR before merge.
Compliance-ready architecture
We design backends for HIPAA, PCI-DSS, and SOC 2 from the start. No costly retrofitting after launch.
Production monitoring included
We configure Sentry, Datadog, and uptime monitoring before launch. You get alerts and 30 days of support post-release.
Full code ownership
You own every line of code and the AWS/GCP account. No licensing fees, no vendor lock-in, no black boxes.
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.