Professional Custom API Development StudioAPI Development
We build secure, scalable APIs that connect your systems. Get a fixed-price MVP in 12 weeks.
IRPR is a professional custom API development studio. We design and build RESTful and GraphQL APIs using Node.js, Python, Go, and PostgreSQL. Every endpoint is defined with an OpenAPI specification and tested for security.
Our delivery model is fixed price and timeline. For $80K-$250K, you get a production-ready API MVP in 8-12 weeks. We work under HIPAA, PCI-DSS, and SOC 2 compliance to meet your industry requirements.
We work with SaaS founders building API-first products, CTOs migrating from monolithic backends, and fintech startups creating payment APIs. Each buyer needs a reliable partner who ships on time without surprises.
Types of software we ship.
REST API Development
Stateless endpoints with JSON responses. We use Express.js and Postman collections for clear documentation.
GraphQL API Development
Flexible queries and subscriptions. Apollo Server and TypeGraphQL for type-safe schemas.
Microservices API Gateway
Unify multiple services behind a single gateway. Kong or Envoy for routing, rate limiting, and authentication.
Third-Party API Integration
Connect to Stripe, Salesforce, Twitter, or 200+ other services. We handle auth, webhooks, and data mapping.
Real-Time API (WebSocket)
Push updates to frontends and devices. Socket.IO or raw WebSockets with Redis Pub/Sub for low latency.
B2B Partner API
Expose product data to partners with API keys and usage plans. AWS API Gateway or Kong with developer portals.
Internal Backend Service API
Internal gRPC or REST services for data exchange between microservices. Protobuf for binary serialization.
Public API Product
Build a developer-facing API with documentation, versioning, and analytics. Stoplight or ReadMe for docs.
We build for every business type.
Finance & Fintech
Healthcare & MedTech
Ecommerce & Marketplaces
SaaS & Platforms
Logistics & Supply Chain
Why Hire a Professional Custom API Development Studio
Building a reliable API requires more than writing routes. It demands architecture decisions that affect scaling, security, and maintenance.
IRPR has shipped over 200 custom APIs for clients in 50 countries. Our senior engineers use OpenAPI specs, automated testing, and CI/CD pipelines to deliver consistent quality. Each API includes rate limiting, authentication, and monitoring from day one.
We follow a proven process: Discovery (2 weeks) to map your data model and endpoints, then a fixed-price Roadmap (1 week), followed by 8-12 weeks of development. You get a production-ready API with source code and full documentation.
The Difference Between a Generic Dev Shop and IRPR
Not every development agency can build APIs that are production-ready from day one. Here is how we compare.
Generic shops treat API development like any other feature. They skip automated testing, neglect rate limiting, and deliver without documentation. This leads to downtime and expensive rewrites.
IRPR treats APIs as products. We design with contract-first approach, write tests for every endpoint, and deploy with monitoring and alerting. The result is an API that scales from day one.
- No OpenAPI spec upfront
- Manual testing only
- No rate limiting or throttling
- No CI/CD for API deployment
- No post-deployment monitoring
- Code ownership unclear
- OpenAPI / GraphQL schema defined before code
- Automated unit and integration tests (100% coverage)
- Rate limiting, caching, and WAF built in
- CI/CD on GitHub Actions with blue-green deployment
- Monitoring with Datadog and PagerDuty alerts
- Full source code ownership with no IP restrictions
Our API Development Process in 4 Steps
We break down every custom API project into four clear phases. Each phase has a fixed output and price.
Phase 1: Discovery (2 weeks). Our engineers map your data sources, define endpoints, and create an OpenAPI specification. You review and approve the spec before any code is written.
Phase 2: Roadmap (1 week). Based on the approved spec, we produce a detailed build plan with a fixed price and 12-week timeline. You sign off on the roadmap, and we start development.
What Ships with Every Custom API
When you hire IRPR as your professional custom API development studio, you get more than code. You get a production-ready system.
Every project includes full source code, API documentation, automated tests, and deployment scripts. We also provide a runbook for your team to operate the API independently.
- Source code in your private Git repository
- OpenAPI 3.0 specification (Swagger/Redoc)
- Postman collection with example requests
- Automated unit and integration tests (Jest/Pytest)
- CI/CD pipeline on GitHub Actions (build, test, deploy)
- Docker container for local development
- Cloud deployment scripts (AWS ECS / GCP Cloud Run / Azure AKS)
- Rate limiting and authentication (JWT or OAuth2)
- Monitoring setup (Datadog dashboards + PagerDuty alerts)
- Load testing report (k6 or Locust)
What we ship in this practice.
Fintech Payment Processing API
Built a PCI-DSS compliant API that processes ACH and credit card payments. Reduced transaction failures by 30% using idempotency and retry logic. Tech stack: Node.js, Stripe API, PostgreSQL, Redis.
Healthcare FHIR Integration API
Developed a FHIR R4 API to sync patient records between a telehealth app and three EHR systems. Integrated with Epic and Cerner APIs in 8 weeks. Tech stack: Python, FastAPI, FHIR, SQLAlchemy.
Ecommerce Order Sync API
Created a high-throughput API for a multi-channel retailer to sync 10,000 orders per hour between Shopify, Amazon, and a custom WMS. Cut order processing time by 60%. Tech stack: Go, gRPC, RabbitMQ, MongoDB.
Logistics Real-Time Tracking API
Designed a WebSocket API for a freight company to stream GPS coordinates from truck drivers to dispatchers. Reduced tracking resolution from 30 minutes to under 5 seconds. Tech stack: Node.js, Socket.IO, Redis, AWS IoT.
SaaS Multi-Tenant API Gateway
Built an API gateway for a B2B SaaS platform that lets 20+ partners integrate with custom auth and rate limits. Onboarded 15 new partners in the first quarter. Tech stack: Kong, Python, PostgreSQL, OAuth2.
Travel Booking Aggregation API
Aggregated pricing and availability from 3 airline and 2 hotel providers into a single search API. Processes $2M in bookings monthly with 99.9% uptime. Tech stack: Node.js, Redis, GraphQL, Apollo Federation.
Why teams hire us.
Fixed Price, Not Hourly
Every project gets a fixed quote during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the total cost before we write a line of code.
Senior Engineers Only
IRPR hires only engineers with 8+ years of experience. No juniors. Your API is built by someone who has shipped production systems to millions of users.
Compliance Built In
We integrate HIPAA, PCI-DSS, SOC 2, and GDPR requirements into the architecture from day one. Audits become paperwork, not rework.
12-Week Delivery Guarantee
Our standard MVP timeline is 12 weeks. For 98% of projects, we deliver on or before that date. If we are late, we discount the final milestone.
Full Code Ownership
You own the source code, documentation, and all IP. There are no licensing fees or restrictions. We retain no rights to your product.
Async-First, Global Overlap
Our team operates across 10 time zones with overlapping hours in New York, London, and Singapore. You get daily progress and real-time Slack communication.
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.