Top Custom API Development FirmAPI Development
We build REST, GraphQL, and gRPC APIs for your business. Get a production-ready API in 8-12 weeks with fixed pricing.
IRPR builds custom APIs using Node.js, Python, Go, NestJS, Express, FastAPI, GraphQL, and gRPC. We design and deploy APIs that integrate with Stripe, Twilio, AWS, Azure, and dozens of other services.
We ship production-ready APIs in 8-12 weeks with fixed pricing between $80,000 and $250,000. Every API is built with HIPAA, PCI-DSS, or SOC 2 compliance where required, and includes a full test suite and monitoring.
CTOs needing a scalable backend for their product. Startup founders launching an MVP with API-first architecture. Enterprise teams migrating from monoliths to microservices. Product managers who need seamless third-party integrations.
Types of software we ship.
REST API Development
Build RESTful APIs using Node.js, Express, or FastAPI with endpoints designed for your business logic and data sources.
GraphQL API Development
Implement GraphQL APIs with Apollo Server or Relay, giving your frontend flexible data queries and real-time subscriptions.
gRPC API Development
Develop high-performance gRPC APIs using Protocol Buffers for low-latency microservice communication.
Microservice API Gateway
Design and deploy an API gateway with Kong or Envoy to route, authenticate, and rate-limit internal services.
Third-party API Integration
Connect your platform to over 50 external APIs including Stripe, Twilio, Salesforce, HubSpot, and Plaid.
Internal API for Enterprise
Create secure internal APIs with OAuth2, RBAC, and audit logs for enterprise data sharing between departments.
Public API for SaaS Products
Launch a developer-friendly public API with documentation, SDKs, usage tiers, and API keys management.
Real-time API (WebSocket)
Build WebSocket APIs with Socket.io or AWS API Gateway WebSockets for live updates and collaborative features.
We build for every business type.
Finance & Fintech
Healthcare
Ecommerce
SaaS
Logistics & Transportation
Why partner with the top custom API development firm
Your API needs to be fast, secure, and scalable from day one.
IRPR has shipped over 200 custom APIs across 50 countries. Our APIs handle millions of requests per day with 99.9% uptime. We use automated CI/CD pipelines and monitoring from day one.
Every API we build includes OpenAPI documentation, Postman collections, and a full test suite. We audit security for HIPAA, PCI, and SOC 2 compliance. Your team can start using the API on day one of launch.
Custom API development vs generic dev shops
Not all API teams are equal. Here is what sets IRPR apart.
Generic development shops treat APIs as an afterthought. They write one endpoint at a time without a design-first approach. You end up with inconsistent naming, no documentation, and security gaps.
IRPR designs your API architecture in week 1. We produce an OpenAPI spec before writing code. Every endpoint is versioned, authenticated, and documented. Our clients ship faster and spend less on rework.
- Undefined scope and changing requirements
- Hourly billing with no price ceiling
- No compliance focus (HIPAA/PCI/SOC 2)
- Slow code reviews with junior developers
- No post-launch monitoring or support
- Generic tech stack with no optimization
- Fixed scope after 2-week Roadmap phase
- Fixed pricing with no surprises
- HIPAA, PCI, SOC 2 compliance built-in
- Senior engineers with 10+ years experience
- 4 months of post-launch support included
- Optimized for your traffic and latency needs
Our API development process
We follow a repeatable 4-phase process that delivers on time and on budget.
Every project starts with a 2-week Roadmap phase. We define the API endpoints, data models, security requirements, and deployment plan. You get a fixed price and timeline before any development begins.
During development we build, test, and deploy in 2-week sprints. You see progress in a staging environment every sprint. Production deployment happens after we pass your acceptance tests.
What ships with every API
Every API project includes more than just code.
You receive full ownership of the source code, infrastructure scripts, and documentation. IRPR provides everything your team needs to run and maintain the API independently.
- Source code in your repository (GitHub/GitLab)
- OpenAPI 3.0 specification
- Postman collection with example requests
- CI/CD pipeline (GitHub Actions or GitLab CI)
- Error tracking with Sentry
- Monitoring dashboard (Datadog or Grafana)
- API security audit report
- Unit and integration test suite
- Deployment to AWS, GCP, or Azure
- Developer onboarding guide
What we ship in this practice.
Payment Processing API for Fintech Startup
Built a REST API handling 10,000 transactions per minute using Node.js, Stripe, and Plaid. Reduced payment failure rate by 30% through intelligent retry logic.
FHIR API for Telemedicine Platform
Developed a HIPAA-compliant FHIR API with Python and FastAPI that integrates with Epic and Cerner. Improved patient data exchange speed by 40%.
Product Catalog API for Ecommerce Marketplace
Created a GraphQL API with PostgreSQL and Elasticsearch that powers product search for 500,000 SKUs. Search response time dropped from 3 seconds to 200ms.
Analytics API for SaaS Dashboard
Built a high-throughput REST API with Node.js and Redis handling 10 million requests per day. Delivered sub-100ms p95 latency on aggregated data.
Route Optimization API for Logistics
Deployed a gRPC API using Go and Google Maps API that optimized delivery routes in real time. Reduced fuel costs by 15% and cut delivery time by 12 minutes per stop.
Content Delivery API for Media Streaming
Built a WebSocket API with AWS CloudFront and HLS that streams live video to 100,000 concurrent viewers. Buffering reduced by 20% through adaptive bitrate switching.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the exact cost before we write a single line of code.
Senior engineers only
All developers have 10+ years of experience building APIs for production systems. We do not outsource to junior developers or use body shops. Every engineer is a senior.
Compliance built-in
HIPAA, PCI-DSS, and SOC 2 are standard requirements in our API builds for healthcare and fintech clients. We include security audits and documentation for your compliance team.
8-12 week delivery
MVPs ship in 8-12 weeks. 98% of our projects deliver on time based on 200+ completed engagements. Our process ensures predictable timelines.
Full ownership
You own the source code, IP, and all deliverables from day one. No licensing fees, no royalties, no vendor lock-in. Your team can take over maintenance anytime.
Post-launch support
4 months of support and monitoring included after launch. We provide 99.9% uptime SLA and respond to production incidents within 30 minutes during business hours.
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.