Senior REST API Development VendorREST API
Build production-grade APIs with senior engineers only. Fixed price, 8-12 week delivery, full code ownership.
IRPR is a senior REST API development vendor that builds APIs with Node.js, Python, Go, and .NET. We design RESTful endpoints, handle authentication (JWT, OAuth 2.0), and document everything in OpenAPI 3.0.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We deliver production-ready APIs with CI/CD, monitoring (Datadog), and compliance (HIPAA, PCI-DSS, SOC 2).
We work with CTOs who need a reliable API backbone, product owners launching SaaS platforms, and engineering leads who want to offload custom API development without hiring full-time staff.
Types of software we ship.
RESTful API for SaaS Platforms
Multi-tenant APIs with rate limiting, Stripe billing integration, and PostgreSQL sharding. Handles 10K+ requests/sec.
Payment Gateway API
PCI-DSS compliant endpoints for Stripe, Braintree, and custom tokenization. Supports 3D Secure and recurring billing.
Healthcare API (FHIR/REST)
HIPAA-compliant REST APIs for EHR integration, patient data exchange, and telehealth platforms using FHIR R4.
Real-Time Data API
WebSocket + REST hybrid APIs for live dashboards, IoT streams, and chat systems. Built with Socket.io and Redis.
Internal Microservices API
Lightweight REST APIs for internal service-to-service communication. Uses gRPC for high-throughput and JWT for auth.
Ecommerce Product & Order API
REST endpoints for product catalogs, cart management, and order fulfillment. Integrates with Shopify, Magento, and custom ERPs.
Third-Party Integration API
Custom adapters to connect legacy systems with modern REST APIs. Handles SOAP-to-REST translation and data normalization.
API Gateway & Aggregation Layer
Single entry point for multiple backend services. Built with Kong or AWS API Gateway, includes caching and rate limiting.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS & Enterprise
Media & Travel
Why Hire a Senior REST API Development Vendor
Building a reliable API requires senior engineers who understand scalability, security, and maintainability from day one.
IRPR has shipped over 200 APIs for clients in 50+ countries. Our senior engineers average 10+ years of experience in RESTful design, authentication, and database optimization. We use OpenAPI 3.0 specs so your frontend teams can start integration immediately.
We guarantee 99.9% uptime for production APIs. Every endpoint is monitored with Datadog alerts and tested with Postman collections. We ship with CI/CD pipelines on GitHub Actions, so you get updates without downtime.
The Difference Between a Generic Dev Shop and IRPR
Most agencies use junior developers and bill hourly. IRPR is a senior REST API development vendor with a fixed-price model.
Generic shops often start coding without a clear spec. They bill hourly, so scope creep becomes your problem. Their APIs lack documentation, monitoring, and security reviews. You end up with technical debt and no ownership of the code.
IRPR works differently. We start with a 2-week Roadmap phase to define endpoints, data models, and auth flows. The price is fixed. Every API ships with OpenAPI docs, automated tests, and a CI/CD pipeline. You own the source code from day one.
- Hourly billing with no cap
- Junior developers with 1-2 years experience
- No API documentation or specs
- No monitoring or alerting
- Code ownership unclear
- Scope creep on every change request
- Fixed price from $80K to $250K
- Senior engineers with 10+ years experience
- OpenAPI 3.0 specs delivered upfront
- Datadog monitoring and alerts included
- Full source code ownership
- Scope defined in Roadmap phase - no surprises
How We Deliver Your Senior REST API Development Project
Our process is designed to reduce risk and deliver a production-ready API in 8-12 weeks.
Phase 1: Roadmap. In 2 weeks, we map every endpoint, data model, and integration. You get a detailed spec and a fixed price. No surprises.
Phase 2: Build. Senior engineers code the API in 6-8 weeks. We use Node.js, Python, or Go. Every endpoint has automated tests and Swagger docs. You see progress in weekly demos.
What Ships With Every Senior REST API Development Project
You get more than just code. Every project includes documentation, infrastructure, and testing tools.
We believe in full transparency. You own everything we build, from the source code to the CI/CD pipelines. We set up monitoring and error tracking so you can sleep at night.
- Source code in your private GitHub repo
- OpenAPI 3.0 specification (YAML/JSON)
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions
- Docker Compose for local development
- Datadog monitoring and alerting
- Sentry error tracking
- Automated unit and integration tests (90%+ coverage)
- Security audit report
- Deployment guide and runbook
What we ship in this practice.
Healthcare API for Telehealth Platform
Built a HIPAA-compliant REST API for a telehealth startup. Integrated with Epic EHR via FHIR R4. Reduced patient data retrieval time by 60%. Tech stack: Python, FastAPI, PostgreSQL, Twilio.
Payment Gateway API for Fintech App
Developed a PCI-DSS Level 1 compliant REST API for a lending platform. Handles 5,000 transactions per minute with Stripe Connect and Plaid. Achieved 99.99% uptime in first year. Tech stack: Node.js, Express, Redis, AWS.
Product Catalog API for Ecommerce Brand
Created a REST API to unify product data from Shopify and a legacy ERP. Synchronized 50,000 SKUs in real-time. Reduced inventory errors by 80%. Tech stack: Go, MongoDB, RabbitMQ, Shopify Admin API.
Multi-Tenant API for SaaS CRM
Designed a RESTful API for a CRM used by 200+ real estate agencies. Included role-based access, rate limiting, and webhook support. Onboarded 50 new tenants in 3 months. Tech stack: .NET Core, SQL Server, Azure API Management.
Real-Time Data API for Logistics Platform
Built a hybrid REST/WebSocket API for tracking 10,000+ shipments daily. Integrated with GPS devices and warehouse scanners. Reduced manual tracking time by 12 hours per week. Tech stack: Node.js, Socket.io, Redis, InfluxDB.
Content Management API for Media Company
Developed a REST API to serve video metadata and playlists to a streaming app. Handles 1 million requests per day with sub-50ms response times. Tech stack: Python, Django, PostgreSQL, CloudFront.
Why teams hire us.
Senior Engineers Only
Every developer on your project has 10+ years of experience. No junior or mid-level engineers. We vet for deep knowledge of REST, auth, and databases.
Fixed Price, Not Hourly
You get a fixed price quote after the Roadmap phase. No hourly billing, no surprise invoices. The price covers everything from design to deployment.
Full Code Ownership
You own all source code, documentation, and infrastructure scripts from day one. No licensing fees, no vendor lock-in.
Compliance Built In
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs by default. Our engineers include security reviews and penetration testing in every project.
8-12 Week Delivery
Most production-ready APIs ship in 8-12 weeks. We use proven patterns and templates to accelerate development without cutting quality.
Post-Launch Support
Every project includes 30 days of post-launch support. We fix bugs, answer questions, and help your team take over. Extended support available at $150/hour.
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.