Professional Custom API Development AgencyAPI Development
We build production-grade APIs in 8-12 weeks. Fixed price, full ownership, senior engineers only.
IRPR is a professional custom API development agency. We build REST, GraphQL, and gRPC APIs using Node.js, Python, Go, and .NET. Every API is designed for scale, security, and low latency.
We ship a custom API in 8-12 weeks with a fixed price from $80K to $250K. Every project includes JWT authentication, rate limiting, API documentation (Swagger/OpenAPI), and CI/CD pipelines. We comply with HIPAA, PCI-DSS, and SOC 2.
CTOs hire us to replace outdated monolithic APIs. Startup founders hire us to build the backend for their SaaS MVP. Enterprise architects hire us to integrate legacy systems with modern microservices.
Types of software we ship.
REST API Development
Build stateless REST APIs with Node.js or Python. Includes Swagger docs, pagination, and error handling.
GraphQL API Development
Build flexible GraphQL APIs with Apollo Server or Hasura. Reduce over-fetching and speed up frontend development.
gRPC API Development
Build high-performance gRPC APIs with Protocol Buffers. Ideal for microservices and low-latency systems.
Third-Party API Integration
Integrate with Stripe, Salesforce, HubSpot, Twilio, and 100+ other APIs. Handle rate limits and webhooks.
Microservices API Architecture
Design and build microservice APIs with Docker and Kubernetes. Service discovery, load balancing, and monitoring included.
API Security Audit and Hardening
Audit your API for OWASP Top 10 vulnerabilities. Implement OAuth 2.0, API keys, and IP whitelisting.
API Documentation and Developer Portal
Generate interactive API docs with Swagger UI or Redoc. Include code samples in 5 languages.
API Migration and Modernization
Migrate legacy SOAP or monolithic APIs to REST or GraphQL. Cut response times by 60% and reduce server costs.
We build for every business type.
SaaS and startups
Enterprise IT
Financial services
Healthcare
Ecommerce and logistics
Why You Need a Professional Custom API Development Agency
A poorly built API costs you time, money, and customers.
APIs are the backbone of modern software. A slow or insecure API can cause data breaches, failed integrations, and angry users. Building a production-grade API requires expertise in authentication, rate limiting, caching, and monitoring.
IRPR has shipped over 200 APIs for clients in 50 countries. Our APIs handle 10,000+ requests per second with 99.9% uptime. We use Redis for caching, PostgreSQL for persistence, and Sentry for error tracking.
How We Build APIs Differently
Most agencies ship code and disappear. We ship documentation, tests, and a deployment pipeline.
We start with a Roadmap phase (week 1-2) where we define the API contract, data model, and expected load. You get a fixed price before a single line of code is written.
During development we write integration tests, set up CI/CD on GitHub Actions, and deploy to AWS or Azure. Every API gets a monitoring dashboard with Datadog or Grafana.
- Hourly billing with no cap
- No API contract upfront
- No integration tests
- No documentation
- No deployment scripts
- Handoff with no support
- Fixed price from day one
- OpenAPI contract in week 1
- 100% integration test coverage
- Swagger docs auto-generated
- CI/CD pipeline on GitHub Actions
- 30-day support after launch
Our API Development Process
From idea to production in 8-12 weeks. Here is exactly how we do it.
We follow a four-phase process: Roadmap, Build, Integrate, Release. Each phase ends with a deliverable you can review and approve.
During the Build phase we write code in 2-week sprints. You get access to a staging environment and weekly demo calls.
What Ships When You Hire IRPR
You get more than just an API endpoint. You get a production-ready system.
Every API project includes the source code, infrastructure as code, and monitoring. You own everything. No licensing fees, no vendor lock-in.
We also provide a runbook for your team so they can maintain and extend the API after launch.
- Source code in your private GitHub repo
- OpenAPI 3.0 specification (Swagger)
- CI/CD pipeline on GitHub Actions
- Docker containers for local development
- Integration tests with 90%+ coverage
- Rate limiting with Redis
- Authentication (JWT, OAuth 2.0, or API keys)
- Deployment scripts for AWS or Azure
- Monitoring dashboard with Datadog
- 30-day post-launch support
What we ship in this practice.
SaaS Backend API
Built a REST API for a B2B SaaS platform using Node.js and PostgreSQL. The API handles 5,000 requests per second with 99.9% uptime. Reduced page load time by 40%.
Payment Integration API
Integrated Stripe and Plaid APIs into a fintech app. Built a custom webhook handler that processes 10,000 transactions per day. PCI-DSS compliant.
Ecommerce Order API
Built a GraphQL API for an ecommerce platform using Apollo Server and MongoDB. Reduced API response time from 300ms to 50ms. Supports 100,000 products.
Healthcare Data Exchange API
Built a HIPAA-compliant FHIR API for a telemedicine startup. Handles secure patient data exchange between EHR systems. Passed a third-party security audit.
Real Estate MLS API
Built a REST API that aggregates MLS listings from 50+ sources. Uses Redis caching to deliver search results in under 200ms. Serves 1,000 real estate agents.
Logistics Tracking API
Built a gRPC API for a logistics company using Go and Protocol Buffers. Processes 50,000 tracking updates per minute. Reduced server costs by 60%.
Why teams hire us.
Fixed price, not hourly
Every API 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 start.
Senior engineers only
Every engineer at IRPR has 10+ years of experience. No juniors, no offshore outsourcing. Your API is built by a senior engineer who has shipped production APIs before.
Full ownership of code
You own all source code, documentation, and infrastructure scripts. No licensing fees, no vendor lock-in. We hand over the GitHub repo and AWS account on day one.
Compliance built in
We build APIs that meet HIPAA, PCI-DSS, and SOC 2 standards. Every API includes encryption at rest, encryption in transit, and audit logging. We pass third-party security audits.
8-12 week delivery
We ship a production-ready API in 8-12 weeks. We use agile sprints, daily standups, and weekly demos. You see progress every week, not just at the end.
Post-launch support included
Every project includes 30 days of post-launch support. We fix bugs, answer questions, and help your team ramp up. After that, we offer ongoing maintenance at a reduced 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.