Expert Custom API Development PartnerAPI Development
We build APIs that connect your systems without breaking your budget. 8-12 week delivery, fixed price, and senior engineers only.
IRPR is an expert custom API development partner that builds REST, GraphQL, and gRPC APIs for web and mobile apps. We use Node.js, Python, Go, and PostgreSQL to deliver APIs that handle millions of requests per day.
Every API ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance like HIPAA, PCI-DSS, and SOC 2. End-to-end testing and documentation are included.
Companies hire IRPR when they need a custom API to connect legacy systems, power a SaaS platform, or support a mobile app. Our typical buyers are CTOs at scaling startups, product managers at mid-market firms, and engineering directors at enterprises.
Types of software we ship.
REST API Development
Stateless RESTful APIs using Express.js or FastAPI. Includes OpenAPI documentation and rate limiting.
GraphQL API Development
Flexible GraphQL APIs with Apollo Server and PostgreSQL. Supports real-time subscriptions.
Third-Party API Integration
Connect your system to Stripe, Salesforce, HubSpot, or custom partner APIs with retry logic and webhooks.
Microservice API Gateway
Single entry point for multiple microservices using Kong or Traefik. Includes auth, logging, and rate limiting.
Real-Time WebSocket API
WebSocket APIs for live data streaming, chat apps, or IoT devices using Socket.IO and Redis.
Internal API for Legacy Systems
Wrap old SOAP or monolith APIs with modern REST layers. Decouple frontend from backend safely.
Public API Platform
Build developer portals with API keys, usage dashboards, and versioning. Think Stripe or Twilio style.
Data Processing API
APIs that transform, aggregate, or enrich data in real-time using Apache Kafka, Snowflake, or Elasticsearch.
We build for every business type.
SaaS platforms
healthcare and fintech
ecommerce and retail
logistics and manufacturing
media and travel
Why you need an expert custom API development partner
A poorly designed API costs more in the long run. IRPR builds APIs that are fast, secure, and easy to maintain.
IRPR has shipped over 200 products including 40+ custom APIs for industries like healthcare, fintech, and ecommerce. Our APIs handle up to 10 million requests per day with 99.9% uptime.
We write every API in Node.js, Python, or Go with PostgreSQL or MongoDB. All endpoints include automated tests using Jest and Supertest. We enforce API standards like pagination, rate limiting, and error codes.
The difference between IRPR and a generic dev shop
Most agencies promise custom APIs but deliver copy-paste code with minimal testing.
Generic shops reuse templates and skip documentation. They charge by the hour and deliver late. You end up with broken integrations and no test coverage.
IRPR writes every API from scratch based on your precise requirements. We include complete OpenAPI specs, unit tests, and Postman collections. All code is owned by you. We deliver on time or we discount.
- Hourly billing with no cap
- Reuses old code without audit
- No test coverage under 30%
- No API documentation
- Late delivery by 4-8 weeks
- No post-launch support
- Fixed price from $80K to $250K
- Code written from scratch for your exact needs
- 90%+ test coverage with Jest and Supertest
- Full OpenAPI 3.0 spec delivered with code
- On-time delivery 98% of projects
- 3 months of production support included
Our API development process in 4 steps
IRPR follows a clear phase-based process from idea to release.
Every project begins with a Roadmap phase where we define the API contract, data model, and endpoints. You know exactly what ships before we write a single line of production code.
After the Roadmap, we build the API in 2-week sprints. You see working endpoints every sprint. We deploy to staging, run load tests, and fix issues before production.
What ships with every custom API from IRPR
You own everything. No black boxes, no hidden fees.
Every IRPR project includes source code, infrastructure code, and full documentation. Your team can take over and maintain the API immediately after launch.
We never lock you into proprietary code or services. All APIs are built on open-source frameworks and standard cloud infrastructure.
- Full source code in your private GitHub repo
- CI/CD pipeline on GitHub Actions or GitLab CI
- OpenAPI 3.0 spec in YAML format
- Postman collection with all endpoints
- Load test results using k6 or Artillery
- Security scan report from OWASP ZAP
- Docker Compose file for local development
- Deployment scripts for AWS or GCP
- Monitoring dashboard with Datadog or Grafana
- 3 months of production support
What we ship in this practice.
Patient Data Exchange API for Telemedicine
Built a HIPAA-compliant API using Node.js, AWS Lambda, and PostgreSQL that syncs patient records between EHR systems. Reduced manual data entry by 8 hours per week per clinic. Handles 50,000+ records daily.
Payment Processing API for Fintech Startup
Developed a PCI-DSS compliant API in Go that routes transactions to multiple payment gateways. Supports Stripe and Square. Achieved 99.99% uptime over 12 months. Processed $10M in payments in the first quarter.
Multi-Supplier Inventory API for Ecommerce
Created a real-time inventory API using Python FastAPI and Redis that aggregates stock data from 50+ suppliers. Reduced overselling by 95%. Updated every 30 seconds.
Subscription Billing API for SaaS
Built a billing API with GraphQL, Apollo Server, and Stripe that handles usage-based pricing. Supports 10,000 subscriptions with automatic proration. Deployed in 10 weeks at a fixed cost of $120K.
MLS Integration API for Real Estate
Developed a REST API in Node.js that ingests MLS listings from 300+ boards. Normalizes data and pushes to Elasticsearch. Reduced listing load time by 70%. Covers 5 states.
IoT Fleet Tracking API for Logistics
Built a WebSocket API using Go and NATS that streams GPS data from 5,000+ trucking devices in real-time. Trains light on AWS Fargate. Reduced fuel costs by 12% through route optimization.
Why teams hire us.
Fixed price, not hourly billing
Every API project ships with a fixed quote agreed in the Roadmap phase. You know the total cost before a single line of code is written. No surprise invoices.
Senior engineers only, no juniors
IRPR only hires engineers with 7+ years of experience. Every API is built by a lead developer who has shipped at least 10 production APIs. No handoff to junior devs.
API-first design with full documentation
We define OpenAPI 3.0 specs and Postman collections before writing code. Your frontend team can build against the spec in parallel. No integration surprises.
Compliance built in from day one
We audit every API for HIPAA, PCI-DSS, or SOC 2 requirements. Encryption at rest and in transit, audit logs, and role-based access control are standard.
On time or we discount
98% of our projects ship on time. If we miss a deadline, we reduce the final invoice by 10% for every week late. Read our delivery guarantee in our terms.
You own everything
Full source code, documentation, and deployment scripts are in your private GitHub repo. No licensing fees. No vendor lock-in. You can take the API to any other team.
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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