Senior REST API Development StudioDevelopment Studio
We design and build REST APIs that survive production traffic. You get a dedicated team of senior engineers and a fixed price in two weeks.
IRPR is a senior REST API development studio. We build production-grade APIs using Node.js, Python, Go, and .NET Core. Every API follows OpenAPI 3.0 specs and includes automated testing with Postman and Jest.
We ship a complete REST API in 8 to 12 weeks. Pricing is fixed and starts at $80K for a standard API with 10 endpoints, authentication, and documentation. All projects meet HIPAA, PCI-DSS, or SOC 2 compliance if required.
CTOs hire us when their in-house team lacks bandwidth for a new integration. Startup founders hire us to build their core product API. Enterprise architects hire us to replace legacy SOAP services with modern RESTful endpoints.
Types of software we ship.
Payment gateway API
Process transactions with Stripe, Braintree, or Adyen. Includes webhook handling and idempotency keys.
Ecommerce product API
Sync inventory, pricing, and orders between Shopify, Magento, and your ERP. Uses GraphQL for complex queries.
Healthcare FHIR API
Compliant with HIPAA and FHIR R4 standards. Exchanges patient data with Epic and Cerner systems.
SaaS billing API
Manages subscriptions, usage metering, and invoicing via Stripe or Chargebee. Supports metered billing.
Real estate MLS API
Ingests listings from MLS providers like RETS and RESO Web API. Normalizes data into a single RESTful endpoint.
Logistics tracking API
Tracks shipments via FedEx, UPS, and USPS APIs. Returns real-time status and estimated delivery windows.
Social media aggregation API
Collects posts from Twitter, Instagram, and LinkedIn using OAuth 2.0. Returns unified JSON responses.
Internal microservices API
Connects legacy databases, message queues, and cloud functions. Uses Docker and Kubernetes for deployment.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics & Travel
Why a Senior REST API Development Studio Matters
A poorly designed API costs months of rework. IRPR builds APIs that scale from day one.
We have shipped over 200 REST APIs across 50 countries. Each API goes through a structured process: requirements, contract-first design with OpenAPI 3.0, implementation, automated testing, and deployment. Our engineers average 10+ years of experience and have built APIs for companies handling 10 million requests per day.
Every API we build includes rate limiting, authentication (JWT or OAuth 2.0), error handling with standard HTTP status codes, and comprehensive documentation. We use Postman collections for testing and Swagger UI for live documentation.
How IRPR Differs from a Generic Dev Shop
Not all API shops are the same. Here is what you avoid with IRPR.
Generic shops assign junior developers who learn on your project. They skip contract-first design and deliver undocumented endpoints that fail under load. You pay hourly and the scope creeps every week.
IRPR assigns a senior architect to every project. We write the OpenAPI spec before any code. You get a fixed price, a clear timeline, and a production-ready API with monitoring and alerts.
- Junior developers with 2 years of experience
- No API contract before coding
- Hourly billing with no cap
- No documentation or mock server
- No load testing or rate limiting
- Code ownership unclear
- Senior engineers with 10+ years each
- OpenAPI 3.0 contract before any code
- Fixed price agreed in Roadmap phase
- Swagger UI and Postman collection included
- Load testing with k6 and rate limiting built in
- Full source code ownership
Our REST API Development Process
We follow a four-phase process that turns your idea into a live API.
Every project starts with a two-week Roadmap phase where we define the API contract, data model, and deployment architecture. You approve the OpenAPI spec before we write a single line of code.
The Build phase lasts 6 to 10 weeks. We implement endpoints, authentication, error handling, and automated tests. The Release phase includes deployment to AWS or GCP with monitoring via Datadog or Sentry.
What Ships with Every REST API
Every API we build includes these deliverables by default. No add-on fees.
You own everything we build. Source code is in your repository from day one. We use your cloud account so there is no vendor lock-in.
Documentation is generated automatically from the OpenAPI spec. You get a live Swagger UI endpoint and a Postman collection for manual testing.
- OpenAPI 3.0 specification file
- Source code in your GitHub or GitLab repository
- CI/CD pipeline with GitHub Actions
- JWT or OAuth 2.0 authentication
- Rate limiting and request validation
- Automated unit and integration tests
- Load tests using k6
- Swagger UI documentation endpoint
- Postman collection for manual testing
- Deployment to AWS ECS, GCP Cloud Run, or your own server
What we ship in this practice.
Payment Processing API for a Fintech Startup
Built a REST API that processes payments via Stripe and Plaid. Handles 50,000 transactions per day with 99.9% uptime. Reduced payment failure rate by 30%. Tech stack: Node.js, PostgreSQL, Stripe, Redis.
Patient Data API for a Telehealth Platform
Designed a HIPAA-compliant FHIR API that syncs patient records with Epic and Cerner. Cut data entry time by 15 hours per week per clinic. Tech stack: Python, FastAPI, FHIR R4, AWS.
Inventory Sync API for an Ecommerce Brand
Created a REST API that syncs inventory between Shopify, Amazon, and a warehouse ERP. Reduced overselling incidents by 95%. Tech stack: Ruby on Rails, PostgreSQL, Shopify API, Amazon MWS.
Subscription Billing API for a SaaS Company
Built a metered billing API with Stripe that tracks per-user usage and generates invoices. Handles 10,000 subscriptions with zero manual intervention. Tech stack: Go, Stripe, MongoDB, Docker.
MLS Data API for a Real Estate Platform
Developed a REST API that ingests listings from 5 MLS providers using the RESO Web API standard. Delivers unified search results in under 200ms. Tech stack: Node.js, Elasticsearch, Redis, AWS Lambda.
Shipment Tracking API for a Logistics Company
Built a tracking API that aggregates data from FedEx, UPS, and USPS. Returns real-time updates and ETA predictions. Reduced customer support calls by 40%. Tech stack: Python, Flask, PostgreSQL, Celery.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost before we write code.
Senior engineers only
Our team averages 10+ years of engineering experience. We do not outsource to junior developers. Every API is built by a senior architect who has shipped production systems before.
Contract-first design
We write the OpenAPI 3.0 spec before any implementation. You approve the contract and test with a mock server. This eliminates rework and miscommunication.
Compliance built in
We build APIs that meet HIPAA, PCI-DSS, and SOC 2 requirements. Your API includes audit logging, encryption at rest and in transit, and access controls from day one.
Full code ownership
Source code lives in your repository from the first commit. We use your cloud account for deployment. You can take the code to any team after we finish.
8 to 12 week delivery
We ship a production-ready REST API in 8 to 12 weeks. Our process is optimized for speed without cutting corners. 98% of our projects deliver on time.
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.