Leading Custom API Development StudioCustom API
We build APIs for SaaS, fintech, and healthcare companies. Fixed price, senior engineers, and delivery in 8-12 weeks.
IRPR builds custom APIs that power your core product. We use Node.js, Express, PostgreSQL, GraphQL, and Redis to deliver high-performance REST and GraphQL APIs with end-to-end encryption.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance like HIPAA, PCI-DSS, and SOC 2. Your team gets full source code, CI/CD pipelines, and 99.9% uptime SLAs.
Clients include SaaS founders needing a public API, healthcare CTOs building HIPAA-compliant integrations, fintech product managers requiring PCI-DSS level 1, and ecommerce directors scaling third-party API integrations.
Types of software we ship.
RESTful API Development
Build stateless REST APIs using Express.js with Swagger documentation and rate limiting. Designed for high-volume mobile backends.
GraphQL API Development
Create flexible GraphQL APIs with Apollo Server, allowing clients to query exactly the data they need. Reduces over-fetching.
Microservices API Development
Architect decoupled microservices with event-driven communication using Kafka or RabbitMQ. Scales independently.
API Integration Services
Connect your product to third-party APIs like Stripe, Salesforce, and Twilio. Includes webhook handlers and error retry logic.
Third-Party API Wrapper
Build a unified layer over multiple external APIs. Handles authentication, rate limiting, and data normalization automatically.
API Gateway Development
Implement a single entry point for all microservices using Kong or AWS API Gateway. Supports authentication, logging, and throttling.
Real-Time API (WebSocket)
Develop WebSocket APIs for live data streaming. Uses Socket.io for real-time messaging and presence detection.
Internal API Infrastructure
Design and build internal APIs for data exchange between services. Includes service discovery, load balancing, and monitoring with Prometheus.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
Why Choose a Leading Custom API Development Studio
IRPR has shipped over 200 custom APIs for clients across 50 countries.
We use a fixed-price model that eliminates surprise costs. Each project begins with a two-week Roadmap phase where we define the API contract, data model, and integration points.
Our senior engineers have built APIs handling millions of requests per day. We enforce strict versioning, comprehensive documentation, and automated testing from day one.
The IRPR Difference: Custom API Development Done Right
Not all API development studios are created equal.
Generic agencies treat APIs as an afterthought. They use boilerplate code, skip documentation, and hand off without testing infrastructure.
IRPR builds production-ready APIs with monitoring, error tracking, and performance optimization from the start. You own every line of code.
- Uses out-of-the-box templates
- No API versioning strategy
- Minimal error handling
- No monitoring or alerting
- Hourly billing with scope creep
- Delivers undocumented endpoints
- Custom design for your exact use case
- Strict versioning (v1, v2) with deprecation plans
- Centralized error logging with Sentry
- Prometheus + Grafana dashboards + uptime monitors
- Fixed price, no surprise invoices
- OpenAPI/Swagger docs auto-generated
Our Custom API Development Process
We follow a transparent four-phase process to deliver your API in 12-14 weeks.
Phase 1: Idea – We define the API scope, endpoints, data flow, and authentication strategy. You get a detailed specification and a fixed price quote.
Phase 2: Roadmap – Within two weeks, we build a prototype that validates your API design. You test real requests before full development begins.
What Ships with Every Custom API
Every API project includes these deliverables by default.
Full source code in your repository with a complete CI/CD pipeline. No code is hidden or licensed to IRPR.
- Source code in your private GitHub/GitLab repo
- CI/CD pipeline with GitHub Actions or GitLab CI
- Sentry error tracking and performance monitoring
- Prometheus metrics + Grafana dashboards for uptime
- OpenAPI 3.0 specification (auto-generated docs)
- Postman collection for manual testing
- Unit tests with coverage >80%
- Load testing results (k6 or Locust)
- API authentication (JWT, OAuth2, or API keys)
- 99.9% uptime SLA with webhook/email alerts
What we ship in this practice.
REST API for a Telemedicine Platform
Built a HIPAA-compliant REST API that reduced appointment scheduling errors by 60%. Tech stack: Node.js, Express, PostgreSQL, Twilio for SMS, Stripe for payments.
GraphQL API for a Fintech Dashboard
Designed a GraphQL API that cut mobile data usage by 40% by eliminating over-fetching. Handles 50,000 queries/min. Tech stack: Apollo Server, Redis, AWS Lambda, PCI-DSS compliant.
Microservices API for Ecommerce Platform
Replaced a monolithic API with microservices using Kafka, reducing deployment time from 2 hours to 10 minutes. Tech stack: RabbitMQ, MongoDB, Docker, Kubernetes.
Third-Party API Wrapper for Logistics
Created a unified API over 5 carrier APIs, saving the client 20 hours per week in manual integrations. Tech stack: Go, PostgreSQL, Redis, Prometheus.
WebSocket API for Real-Time Collaboration Tool
Developed a WebSocket API using Socket.io that supports 10,000 concurrent connections with sub-100ms latency. Tech stack: Node.js, Redis, MongoDB, AWS EC2.
Internal API Gateway for SaaS Platform
Implemented an API gateway using Kong that consolidated 8 internal services, improving developer productivity by 30%. Tech stack: Kong, PostgreSQL, OpenResty, Prometheus.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
All IRPR engineers have 10+ years of experience. No junior developers work on your API. You get a dedicated lead architect.
8-12 week MVPs
We ship a production-ready API in 8-12 weeks. Our record is a 6-week delivery for a fintech API handling 100,000 requests/day.
Full code ownership
You own all source code from day one. No licensing fees, no proprietary frameworks. Transfer to your team anytime.
Enterprise compliance built-in
We integrate HIPAA, PCI-DSS, and SOC 2 controls from the start. Our APIs pass security audits with zero findings.
200+ products shipped
We have delivered over 200 custom APIs for clients in 50+ countries. 98% of projects finish on time and on budget.
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.