Expert Custom API Development DevelopersAPI Development
We build production-grade APIs that connect your systems and scale to millions of requests. Fixed price, 8-12 week delivery, full code ownership.
IRPR builds custom APIs for companies that need reliable, secure, and fast data exchange between systems. We use Node.js, Python, Go, and Java with frameworks like Express, FastAPI, and Spring Boot to deliver REST, GraphQL, and gRPC endpoints.
Every API project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle authentication (OAuth 2.0, JWT), rate limiting, documentation (OpenAPI/Swagger), and compliance (HIPAA, PCI-DSS, SOC 2).
We work with CTOs who need to integrate legacy systems with modern SaaS platforms, product managers launching a new mobile app that requires a backend API, and engineering leads who want to outsource API development while keeping full code ownership.
Types of software we ship.
REST API Development
Stateless HTTP APIs using Node.js or Python. Includes OpenAPI docs, JWT auth, and PostgreSQL or MongoDB persistence.
GraphQL API Development
Flexible query APIs with Apollo Server or Hasura. Supports real-time subscriptions and federated schemas for microservices.
gRPC API Development
High-performance binary APIs using Protocol Buffers. Ideal for internal microservices and low-latency systems.
Third-Party API Integration
Connect your app to Stripe, Salesforce, HubSpot, or custom endpoints. Includes error handling, retry logic, and webhook management.
API Gateway Development
Build a single entry point for multiple microservices using Kong or AWS API Gateway. Includes rate limiting, caching, and auth.
Real-Time API Development
WebSocket and Server-Sent Events APIs for live dashboards, chat, and notifications. Built with Socket.IO or AWS AppSync.
Internal API Development
Private APIs for internal tools and microservices. Includes service discovery, logging, and monitoring with Prometheus and Grafana.
API Security Audit & Hardening
Review existing APIs for OWASP Top 10 vulnerabilities. Add rate limiting, input validation, and encryption. Delivers a security report.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics & Manufacturing
Why Expert Custom API Development Developers Matter
A poorly designed API costs you time, money, and customer trust.
IRPR has shipped over 200 APIs for clients in 50+ countries. Our developers follow strict patterns: versioning (v1, v2), pagination (cursor-based), error handling (RFC 7807), and idempotency keys. Every API includes automated tests with 90%+ coverage and a CI/CD pipeline on GitHub Actions.
We use Postman for contract testing, Sentry for error tracking, and Datadog for performance monitoring. Our APIs handle 10,000+ requests per second with 99.9% uptime. You get full ownership of the code, docs, and infrastructure.
Generic Dev Shop vs Expert Custom API Development Developers
Not all API developers are the same. Here is what sets IRPR apart.
Many agencies treat API development as an afterthought. They skip documentation, ignore rate limiting, and deliver code that breaks under load. IRPR treats APIs as first-class products with proper versioning, monitoring, and security.
We start every project with a Roadmap phase (week 2) where we define endpoints, data models, and auth flows. You get a fixed price and a clear timeline before any code is written.
- No API versioning strategy
- No automated tests
- No rate limiting or throttling
- No monitoring or alerting
- No OpenAPI documentation
- Hourly billing with scope creep
- API versioning (v1, v2) from day one
- 90%+ test coverage with CI/CD
- Rate limiting with Redis and token bucket
- Sentry + Datadog monitoring included
- OpenAPI/Swagger docs auto-generated
- Fixed price, no surprises
Our API Development Process
We follow a four-phase process that delivers a production-ready API in 8-12 weeks.
Every project starts with a discovery call where we map your data sources, user roles, and integration points. We then move to the Roadmap phase where we define every endpoint, data model, and auth flow. You get a fixed price and timeline before any code is written.
During the Product phase, our senior engineers build the API in two-week sprints. You see working endpoints every sprint. The Release phase includes load testing, security audit, and deployment to your cloud (AWS, GCP, or Azure).
What Ships With Every API
Every API project includes these deliverables by default.
You get more than just code. Every API ships with documentation, tests, monitoring, and deployment scripts. No hidden extras.
- Source code in your GitHub/GitLab repo
- OpenAPI/Swagger documentation
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions
- Automated tests with 90%+ coverage
- Sentry error tracking
- Datadog performance monitoring
- Rate limiting with Redis
- Docker Compose for local development
- Deployment scripts for AWS, GCP, or Azure
What we ship in this practice.
Healthcare EHR Integration API
Built a HIPAA-compliant REST API that connects a telemedicine platform with Epic and Cerner EHR systems. Reduced manual data entry by 12 hours per week. Tech stack: Node.js, Express, FHIR, PostgreSQL, AWS.
Fintech Payment Gateway API
Developed a PCI-DSS compliant payment API that processes 5,000 transactions per minute. Integrated with Stripe and Plaid. Reduced chargebacks by 30%. Tech stack: Python, FastAPI, Stripe API, Redis, Docker.
Ecommerce Inventory Sync API
Created a GraphQL API that syncs inventory across Shopify, Amazon, and a custom warehouse system. Cut inventory errors by 95%. Tech stack: Node.js, Apollo Server, Shopify API, MongoDB, AWS Lambda.
SaaS Multi-Tenant User API
Built a gRPC API for a B2B SaaS platform that manages 50,000 users across 200 tenants. Achieved 99.99% uptime. Tech stack: Go, gRPC, PostgreSQL, Kubernetes, Prometheus.
Real Estate MLS Data API
Developed a REST API that aggregates MLS listings from 10 different sources into a single search endpoint. Reduced listing update time from 4 hours to 5 minutes. Tech stack: Python, FastAPI, Elasticsearch, Redis, AWS.
Logistics Shipment Tracking API
Created a real-time WebSocket API that tracks 10,000 shipments per day across FedEx, UPS, and USPS. Reduced customer support calls by 40%. Tech stack: Node.js, Socket.IO, Redis, PostgreSQL, AWS.
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 write a single line of code.
Senior engineers only
IRPR does not hire juniors. Every developer has 8+ years of experience building production APIs. You work directly with the engineer who writes your code.
Full code ownership
You own every line of code, every test, every document. No licensing fees, no vendor lock-in. We push the code to your repository from day one.
Compliance built in
We build APIs that meet HIPAA, PCI-DSS, and SOC 2 requirements. Our developers follow OWASP guidelines and include encryption, audit logs, and access controls by default.
8-12 week delivery
Most APIs ship in 8-12 weeks. We use two-week sprints with working endpoints at the end of each sprint. You see progress every 14 days.
Post-launch support
After launch, we provide 30 days of bug fixes and monitoring support. We also offer ongoing maintenance at a fixed monthly 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.
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