Professional API Development AgencyAPI Development
We build production-grade APIs for web, mobile, and SaaS products. 200+ APIs shipped in 50+ countries with fixed pricing and 8-12 week delivery.
IRPR builds production-grade APIs for companies that need reliable, scalable data exchange between systems. We use Node.js, Go, Python, and Rust to build REST, GraphQL, and gRPC APIs with PostgreSQL, MongoDB, and Redis backends.
Every API ships with auto-generated documentation (OpenAPI/Swagger), CI/CD pipelines on GitHub Actions, and monitoring with Datadog or Sentry. Typical delivery is 8-12 weeks. Fixed pricing starts at $80K for a standard API and goes to $250K+ for multi-service architectures with compliance needs like HIPAA or PCI-DSS.
We work with CTOs who need a secure partner API for their platform, product managers launching a mobile app that depends on a custom backend, and engineering leads who want to offload API development to a senior team without hiring.
Types of software we ship.
REST API development
Build stateless RESTful APIs with Node.js or Go. Includes OpenAPI docs, rate limiting, and JWT auth.
GraphQL API development
Build a single GraphQL endpoint that aggregates data from multiple sources using Apollo Server or Relay.
gRPC API development
High-performance gRPC APIs for microservices using Protocol Buffers. Ideal for internal service-to-service calls.
Payment gateway API integration
Integrate Stripe, Braintree, or Adyen into your platform. Handles webhooks, idempotency, and PCI-DSS compliance.
CRM API integration
Connect your app to Salesforce, HubSpot, or Zoho via their REST APIs. Sync contacts, deals, and custom objects.
Third-party API aggregation
Build a unified API layer that normalizes data from multiple third-party services like Shopify, QuickBooks, and Xero.
API gateway development
Deploy an API gateway with Kong or AWS API Gateway. Handles auth, rate limiting, caching, and routing.
Real-time API development
Build WebSocket or Server-Sent Events APIs for live data feeds. Used in chat, dashboards, and logistics tracking.
We build for every business type.
Fintech companies
Healthcare organizations
Ecommerce businesses
SaaS platforms
Logistics and supply chain
Why choose a professional API development agency
Building an API that scales, stays secure, and integrates with your existing stack requires senior engineering discipline.
IRPR has shipped 200+ APIs for clients in fintech, healthcare, and SaaS. Each API goes through a structured Roadmap phase (week 2) where we define endpoints, data models, and auth flows before writing a single line of code. This eliminates rework and keeps the project on a fixed budget.
Our APIs handle 50,000+ requests per minute on average. We use caching with Redis, connection pooling, and auto-scaling on AWS ECS or Kubernetes. Every API ships with a monitoring dashboard that tracks latency, error rates, and throughput.
How IRPR differs from other API development agencies
Most agencies bill hourly and deliver incomplete documentation. IRPR delivers a production-ready API with full ownership.
When you hire a generic dev shop, you often get an API with no tests, no documentation, and no monitoring. The code is rushed, the endpoints are inconsistent, and you have no way to verify uptime or performance.
IRPR ships every API with a test suite (Jest or pytest), auto-generated OpenAPI docs, and a Datadog dashboard. We run load tests with k6 before launch. You get the source code in your own GitHub repo from day one.
- Hourly billing with no cap
- No API documentation
- No test coverage
- No monitoring setup
- No load testing
- Code stays on their servers
- Fixed price from Roadmap phase
- OpenAPI/Swagger docs auto-generated
- 90%+ test coverage
- Datadog or Sentry monitoring
- k6 load tests before launch
- Source code in your repo day 1
Our API development process
Every API project follows a 4-phase process that guarantees delivery on time and on budget.
Phase 1 is the Idea phase where we map your business logic to API endpoints. Phase 2 is the Roadmap where we produce a fixed-price contract with a detailed spec. Phase 3 is Product where we build and test. Phase 4 is Release where we deploy and hand over.
The Roadmap phase takes 1-2 weeks and costs a fixed fee. After that, you know exactly what you will get and how much it will cost. No surprises.
What ships with every API
Every API from IRPR includes a complete production setup. Nothing is optional.
We do not hand over a zip file. You get a fully operational API running on your own AWS account with monitoring, logging, and alerting configured. Your team can start integrating the API immediately.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- OpenAPI/Swagger documentation
- Test suite with 90%+ coverage
- Datadog or Sentry error tracking
- k6 load test results
- Deployment scripts for AWS ECS
- Rate limiting and auth middleware
- Postman collection for testing
- 30-day post-release support
What we ship in this practice.
Payment processing API for a fintech startup
Built a PCI-DSS compliant payment API that processes 10,000 transactions per day. Integrated Stripe Connect for marketplace payouts. Reduced payment failure rate by 40%. Tech stack: Node.js, PostgreSQL, Stripe, Redis.
Patient data API for a telehealth platform
Developed a HIPAA-compliant API that syncs patient records between the mobile app and Epic EHR. Handles 5,000 patient records daily with PHI encryption at rest and in transit. Tech stack: Go, FHIR, MongoDB, AWS KMS.
Product catalog API for an ecommerce brand
Built a GraphQL API that aggregates inventory from 3 warehouses and 2 suppliers. Reduced product sync time from 4 hours to 12 minutes. Tech stack: GraphQL, Apollo Server, PostgreSQL, Redis.
Subscription management API for a SaaS company
Created a billing API that handles tiered pricing, proration, and dunning emails. Integrated with Stripe and Recurly. Reduced churn by 15% through automated retries. Tech stack: Node.js, PostgreSQL, Stripe, Bull queue.
Real-time tracking API for a logistics startup
Built a WebSocket-based API that streams GPS coordinates from delivery drivers to a customer dashboard. Handles 1,000 concurrent connections with under 200ms latency. Tech stack: Node.js, Socket.io, Redis, AWS ECS.
Learning management API for an edtech platform
Developed a FERPA-compliant API that manages courses, enrollments, and grades. Integrated with Canvas LMS via REST. Reduced manual grade entry by 8 hours per week per teacher. Tech stack: Python, Django, PostgreSQL, Celery.
Why teams hire us.
Senior engineers only
Every IRPR engineer has 10+ years of experience. We do not hire juniors or outsource. Your API is built by a senior backend engineer who has shipped APIs for companies like Stripe and Twilio.
Fixed price, not hourly
You get a fixed price after the Roadmap phase. No hourly billing, no surprise invoices, no scope creep charges. The price covers the entire build including testing, documentation, and deployment.
Production-ready from day one
Your API ships with monitoring, logging, and alerting. We configure Datadog dashboards and Sentry error tracking before launch. You know the API is healthy from the first request.
Full code ownership
You own the source code, the repo, and the infrastructure. We never hold your code hostage. You can take the API to any internal team or agency after the project ends.
Compliance built in
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliant APIs. Our team has shipped APIs for healthcare, fintech, and edtech clients. We include encryption, audit logs, and access controls by default.
Quick start
We can start within 1-2 weeks of signing. The Roadmap phase takes 1-2 weeks. After that, you have a detailed spec and a fixed price. Total time to first endpoint in production is under 4 weeks.
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.