Senior REST API Development AgencyDevelopment Agency
We build production-grade REST APIs for SaaS, fintech, and healthcare. 8-12 week delivery with fixed pricing.
IRPR is a senior REST API development agency. We build RESTful APIs using Node.js, Python (FastAPI), Go, and .NET Core. Every API follows OpenAPI 3.0 specs and includes automated testing with Postman and Jest.
We ship production-ready REST APIs in 8-12 weeks. Pricing is fixed at $80K-$250K depending on complexity. Our APIs are HIPAA, PCI-DSS, and SOC 2 compliant. We handle authentication, rate limiting, caching, and documentation.
CTOs hire us when their in-house team lacks senior API talent. Product owners hire us to build the backend for their SaaS MVP. Engineering managers hire us to replace legacy SOAP or monolithic APIs with modern RESTful services.
Types of software we ship.
REST API for SaaS platforms
Multi-tenant REST APIs with Stripe billing, user roles, and webhook support. Built with FastAPI or Node.js.
REST API for mobile apps
Backend APIs for iOS and Android apps. Includes push notifications via Firebase, file uploads to S3, and offline sync.
REST API for ecommerce
Product catalog, cart, checkout, and order management APIs. Integrates with Shopify, Stripe, and PayPal.
REST API for healthcare
HIPAA-compliant APIs for EHR integration, patient portals, and telemedicine. Uses FHIR standards and AWS HealthLake.
REST API for fintech
PCI-DSS compliant APIs for payments, KYC, and transaction processing. Integrates with Plaid, Stripe, and Dwolla.
REST API for real estate
MLS data APIs, property search, and lead management. Integrates with IDX, RETS, and BridgeMLS.
REST API for IoT
Device management, telemetry ingestion, and command APIs. Uses MQTT, AWS IoT Core, and TimescaleDB.
REST API for analytics
Data ingestion, aggregation, and reporting APIs. Built with ClickHouse, Apache Kafka, and Metabase.
We build for every business type.
SaaS companies
healthcare organizations
fintech companies
ecommerce brands
logistics and manufacturing
Why hire a senior REST API development agency
Building a production-grade REST API requires deep knowledge of authentication, caching, rate limiting, and error handling.
IRPR has shipped over 200 REST APIs for clients in 50 countries. Our senior engineers have built APIs that handle 10,000+ requests per second with 99.9% uptime. We use Redis for caching, Nginx for load balancing, and Cloudflare for DDoS protection.
Every API we build includes OpenAPI 3.0 documentation, automated tests with 90%+ coverage, and a CI/CD pipeline on GitHub Actions. We deploy to AWS ECS or Kubernetes with auto-scaling. Our APIs are audited for OWASP Top 10 vulnerabilities.
Generic dev shop vs senior REST API agency
Not all agencies build APIs the same way. Here is what sets IRPR apart.
Generic dev shops often skip API documentation, use inconsistent error formats, and ignore security best practices. They deliver APIs that are hard to maintain and scale.
IRPR follows strict RESTful conventions, uses OpenAPI 3.0 for documentation, and implements OAuth 2.0 with JWT tokens. Every API includes rate limiting, pagination, and structured error responses.
- No OpenAPI documentation
- Inconsistent error responses
- No rate limiting
- No automated tests
- No CI/CD pipeline
- No security audit
- OpenAPI 3.0 docs auto-generated
- Structured error responses (RFC 7807)
- Rate limiting with Redis
- 90%+ test coverage
- CI/CD on GitHub Actions
- OWASP Top 10 audit
How we build your REST API in 8-12 weeks
Our process is designed to get you a production-ready API fast without cutting corners.
We start with a 2-week Roadmap phase where we define the API contract, data model, and authentication strategy. You get a fixed price and timeline before any code is written.
Then we build in 2-week sprints. You see working endpoints every sprint. We deploy to a staging environment with real data. After 8-12 weeks, you get a fully documented, tested, and deployed API.
What ships with your REST API
You get more than just endpoints. Every API comes with a full production toolkit.
We deliver source code in your private GitHub repo, a CI/CD pipeline on GitHub Actions, and a staging environment on AWS. You also get Postman collections and OpenAPI docs.
Monitoring is set up with Sentry for error tracking and Datadog for performance. We include a deployment guide and a 30-day support window after launch.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- OpenAPI 3.0 documentation
- Postman collection with examples
- Staging environment on AWS ECS
- Sentry error tracking
- Datadog performance monitoring
- Deployment guide and runbook
- 30-day post-launch support
- Full ownership of all code
What we ship in this practice.
SaaS subscription management API
Built a multi-tenant REST API for a B2B SaaS platform. Handles user roles, Stripe billing, and webhook events. Reduced time to onboard new customers by 60%. Tech stack: Node.js, PostgreSQL, Redis, Stripe.
Healthcare patient portal API
Developed a HIPAA-compliant REST API for a telemedicine startup. Integrates with Epic EHR via FHIR. Handles 5,000+ patient records daily. Tech stack: FastAPI, PostgreSQL, AWS HealthLake, Twilio.
Fintech payment processing API
Created a PCI-DSS compliant REST API for a lending platform. Processes 10,000+ transactions per day with 99.99% uptime. Integrates with Plaid and Dwolla. Tech stack: Go, PostgreSQL, Redis, Stripe.
Ecommerce order management API
Built a REST API for a multi-channel ecommerce brand. Syncs inventory across Shopify, Amazon, and WooCommerce. Reduced manual order entry by 8 hours per week. Tech stack: Node.js, MongoDB, Shopify API, Stripe.
Real estate MLS data API
Developed a REST API that ingests MLS data from 3 sources and serves property listings to a mobile app. Handles 50,000+ listings with sub-100ms response times. Tech stack: Python, PostgreSQL, Redis, BridgeMLS.
Logistics fleet tracking API
Built a REST API for a logistics company to track 500+ vehicles in real time. Integrates with GPS devices and Google Maps. Reduced fuel costs by 15% through route optimization. Tech stack: Node.js, TimescaleDB, MQTT, AWS IoT Core.
Why teams hire us.
Senior engineers only
Every engineer at IRPR has 8+ years of experience building REST APIs. No juniors, no offshore teams. You work directly with the person writing your code.
Fixed price, not hourly
We give you a fixed quote after the 2-week Roadmap phase. No hourly billing, no surprise invoices. You know the cost before we write a line of code.
8-12 week delivery
We ship production-ready REST APIs in 8-12 weeks. Our average is 10 weeks. You get a working API with documentation, tests, and deployment.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs. Our engineers know the audit requirements and bake them into the architecture from day one.
Full code ownership
You own all source code, documentation, and infrastructure. No licensing fees, no vendor lock-in. We hand over everything in your GitHub repo.
Post-launch support
We include 30 days of post-launch support. If something breaks, we fix it. After that, we offer ongoing maintenance at a fixed monthly rate.
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.