Leading Custom API Development PartnerAPI Development
We build production-ready APIs that connect your data and systems. Fixed pricing sets your budget from day one.
IRPR builds custom APIs that drive your core business applications and third-party integrations. We use Node.js, Python, Go, FastAPI, and Express to craft scalable, secure endpoints.
Every API ships with full documentation, automated tests, and CI/CD pipelines in 8-12 weeks. Pricing ranges from $80K to $250K depending on complexity, and we support compliance standards like HIPAA, PCI-DSS, and SOC 2.
CTOs modernizing legacy stacks hire us. Product teams launching B2B platforms hire us. SaaS companies building partner ecosystems hire us. Startup founders needing production-ready backend infrastructure hire us.
Types of software we ship.
RESTful API
Stateless, resource-based APIs for web and mobile. We use Express.js or FastAPI with JWT authentication.
GraphQL API
Flexible querying for complex data models. Built with Apollo Server or Hasura, ideal for real-time dashboards.
Microservices API
Decoupled services communicating via gRPC or message queues. We use Docker and Kubernetes for orchestration.
Webhook Integration
Event-driven callbacks for real-time data sync. Connects Stripe, Slack, Shopify, or any webhook-enabled platform.
Third-Party API Wrapper
Abstraction layer over SaaS APIs (Salesforce, HubSpot, Twilio). Normalizes responses and handles rate limiting.
API Gateway
Unified entry point for multiple services. Built with NGINX or Kong, includes rate limiting, auth, and logging.
Internal Developer API
APIs used by your own teams to build features faster. Includes SDK generation and internal documentation.
Public API Marketplace
Developer-facing APIs with usage plans, keys, and analytics. Uses Stripe billing and developer portals.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
Why choose IRPR as your custom API development partner?
We deliver APIs that work under real traffic, not just demos.
IRPR has shipped over 200 products across 50 countries. Our APIs power payment flows for fintech, patient data for healthcare, and order pipelines for ecommerce. Every API is built by senior engineers with 10+ years of experience.
We follow a fixed-price model that eliminates surprises. During the Roadmap phase we define the exact scope and price. Our average time to a production API is 12 weeks. 98% of our projects finish on time.
The IRPR difference for custom API development
Not all API development partners work the same way. Here is how we compare.
We see too many projects stall because of unclear scopes, hidden costs, and junior engineers. Generic dev shops often treat APIs as an afterthought, shipping undocumented endpoints that break in production.
IRPR treats APIs as the foundation. Our dedicated senior engineers write spec-first (OpenAPI 3.0) and test every endpoint. You get full ownership of the code and infrastructure from day one.
- Unclear pricing with hourly billing surprises
- No compliance expertise (HIPAA, PCI, SOC 2)
- Junior engineers learning on your project
- No documentation or test coverage
- Long, undefined timelines
- No post-launch support or monitoring
- Fixed price determined in the Roadmap phase
- Compliance-ready from day one (HIPAA, PCI, SOC 2)
- Senior engineers with 10+ years experience
- Full OpenAPI 3.0 documentation and automated tests
- 8-12 week timeline with 98% on-time rate
- Production monitoring, error tracking, and support SLAs
How we build your custom API
From idea to production in four phases, each with a clear deliverable.
Every API project starts with a Discovery phase where we map your data sources and integration points. We define the schema, endpoints, auth model, and success metrics. This takes 1-2 weeks.
The Build phase uses CI/CD from day one. We ship code to your repo weekly. The Deploy phase launches to your cloud (AWS, Azure, GCP) with monitoring and alerting already in place.
What ships with every API
Every project includes these deliverables by default.
You get more than just endpoints. We provide everything needed to integrate, test, and maintain your API from day one.
Our checklist ensures nothing is forgotten. All code, configurations, and documentation are yours.
- Source code in your Git repository
- OpenAPI 3.0 specification
- Automated test suite (unit, integration, e2e)
- CI/CD pipeline on GitHub Actions
- Postman collection with example calls
- Docker configuration for local development
- Monitoring dashboard in Datadog
- Error tracking with Sentry alerts
- Rate limiting and JWT/OAuth 2.0 auth
- API usage logging and analytics
What we ship in this practice.
Payment processor API for fintech
Built a REST API that handles payment routing, refunds, and reconciliation. Used Node.js, Express, and Stripe. Reduced integration time for merchant partners by 60%.
FHIR API for healthcare data exchange
Developed a HIPAA-compliant FHIR API for a telemedicine platform. Used Python, FastAPI, and PostgreSQL. Cut patient data retrieval from 5 seconds to 200ms.
Product catalog API for ecommerce
Created a GraphQL API serving product data to web and mobile apps. Used Apollo Server, MongoDB, and Redis. Supported 10,000 queries per second during Black Friday.
Multi-tenant API for SaaS platform
Designed a SOC 2 compliant API with per-tenant isolation. Used Go, gRPC, and Kubernetes. Onboarded 50 enterprise customers in the first quarter.
Real-time tracking API for logistics
Built a webhook-heavy API that aggregates tracking data from FedEx, UPS, and DHL. Used Node.js, Kafka, and MongoDB. Reduced manual tracking checks by 8 hours per week.
Examination data API for edtech
Developed a REST API for online proctoring and results delivery. Complied with FERPA guidelines. Used Python, FastAPI, and AWS Lambda. Supported 100,000 concurrent test takers.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote during the Roadmap phase (week 1-2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Our team averages 10+ years of experience. You never get junior developers learning on your project. Each API is built by engineers who have done it before.
8-12 week timeline guarantee
We deliver a production-ready API in 8-12 weeks. 98% of our projects finish on time. If we miss, we cover the extra week at no cost.
Compliance-ready from day one
We build HIPAA, PCI, and SOC 2 compliant APIs by default. Our infrastructure uses encryption, audit logs, and access controls that meet these standards.
Full ownership and source code
You own every line of code, every config, and every document. We transfer everything to your repositories on day one. No licenses, no lock-in.
Ongoing support and maintenance
We offer post-launch support packages starting at $5K/month. Includes monitoring, bug fixes, minor feature updates, and 4-hour response SLA.
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.