Top Custom API Development PartnerAPI Development
We build REST, GraphQL, and gRPC APIs that power your product. 8-12 weeks to a production-ready API with full documentation.
IRPR is a custom API development partner that builds production-grade APIs using Node.js, Go, Python, and TypeScript. We design REST, GraphQL, WebSocket, and gRPC end points that handle millions of requests per day with sub-50ms latencies.
Every API project ships in 8-12 weeks with a fixed price between $80K and $250K. We deliver auto-generated OpenAPI documentation, Postman collections, and CI/CD pipelines. Our infrastructure is SOC 2 and HIPAA compliant by default.
We work with CTOs who need a scalable API for their SaaS product, product managers integrating multiple third-party services, startups launching a new platform that requires external data feeds, and enterprise teams migrating from monoliths to microservices.
Types of software we ship.
RESTful API Development
Stateless, resource-oriented APIs built with Express.js or FastAPI. Includes versioning, rate limiting, and detailed OpenAPI specs.
GraphQL API Development
Single end point APIs using Apollo Server or Yoga. Resolvers fetch exactly the data clients request. Reduced overfetching by 60 percent.
WebSocket API Development
Real-time bidirectional communication with Socket.io or ws library. Ideal for live chat, notifications, and collaborative editing.
gRPC API Development
High-performance RPC protocol using Protocol Buffers. Microservices communicate 4x faster than JSON REST. Used by IoT and event-driven systems.
Third-Party API Integration
Connect your product to Stripe, Salesforce, HubSpot, Twilio, or any public API. Includes caching, retry logic, and error handling.
Internal Microservices API
Event-driven, decoupled APIs for internal systems. Built with message brokers like RabbitMQ or Kafka. Average latency under 10 ms.
API Gateway Development
Single entry point with Kong or AWS API Gateway. Handles authentication, rate limiting, logging, and request transformation for multiple services.
Real-Time Streaming API
Stream data using Server-Sent Events (SSE) or WebSockets. Built with Kafka streams or Redis Pub/Sub. Delivers updates in under 100ms.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
Why IRPR is a top custom API development partner
We deliver production-ready APIs with full documentation and CI/CD pipelines.
IRPR has shipped over 200 products across 50 countries. Our APIs handle an average of 500K requests per day with 99.9 percent uptime. Every project includes load testing, error tracking with Sentry, and automated deployment via GitHub Actions.
We start with a 2-week Roadmap phase where we design the API contract using OpenAPI. You get the full schema and a Postman collection before any code is written. This ensures no surprises and keeps development on schedule.
How we differ from other API development shops
Most agencies bill hourly and deliver incomplete documentation. We do the opposite.
Generic dev shops often provide vague estimates and deliver undocumented code. You inherit technical debt and spend months fixing integration issues. IRPR follows a fixed-price, documented approach from day one.
Our APIs include auto-generated Postman collections, OpenAPI specs, and integration guides. We also set up monitoring, logging, and alerting during the Product phase. Your team gets a complete system, not just code.
- Hourly billing with no cap
- No API documentation delivered
- No load testing
- No CI/CD pipeline
- Code not versioned properly
- No post-launch monitoring setup
- Fixed price from the Roadmap phase
- OpenAPI specs and Postman collections included
- Load testing with k6 and results report
- CI/CD on GitHub Actions with automated tests
- Git versioned with conventional commits
- Sentry error tracking and Datadog dashboards
Our 4-phase process for custom API development
From concept to deployment in 8-12 weeks with clear milestones.
Every API project at IRPR follows the Idea, Roadmap, Product, Release framework. You know exactly what you get at each step. There are no surprises.
The Roadmap phase is crucial. We define all end points, data models, authentication methods, and integration points. After you approve the Roadmap, the price is locked and development begins.
What ships with every custom API project
You get more than code. Every deliverable is production ready.
IRPR treats documentation as a first-class deliverable. Your team can use the API immediately after handoff without asking us a single question.
We also leave behind automated tests, monitoring, and a deployment pipeline so you can maintain the API yourself or scale it further.
- Source code in your private GitHub repository
- OpenAPI 3.0 specification (YAML/JSON)
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions with automated tests
- Load test report from k6 (including p50, p95, p99 latencies)
- Sentry error tracking configured
- Datadog dashboard for request volume and latency
- Integration guide with code snippets for 3 client languages (cURL, Python, JavaScript)
- Docker Compose file for local development
- API documentation hosted on SwaggerHub or Stoplight
What we ship in this practice.
Fintech payment processing API
Built a PCI DSS compliant API for a payment aggregator. Processes 10K transactions per minute with 99.99% uptime. Stack: Go, PostgreSQL, Stripe Connect, Redis.
Healthcare FHIR API for EHR integration
Designed a HIPAA compliant FHIR API that connects 3 hospital systems. Reduced patient data retrieval time from 30 seconds to under 2 seconds. Stack: Node.js, HL7 FHIR, AWS HITRUST, Auth0.
SaaS multi-tenant API for analytics dashboard
Developed a GraphQL API serving 500+ tenants with per-tenant data isolation. Cut front-end load times by 40%. Stack: Apollo Server, Prisma, PostgreSQL, Redis.
Ecommerce order fulfillment API
Created a REST API that integrates with ShipStation, FedEx, and UPS. Automated 90% of manual order routing and saved 8 hours of staff time per week. Stack: FastAPI, Celery, RabbitMQ, Stripe.
Real-time logistics tracking API
Built a WebSocket API that streams GPS data from 2,000 delivery vehicles. Provides ETAs updated every 5 seconds. Stack: WebSocket, Node.js, Redis Pub/Sub, Google Maps API.
Media content delivery API
Developed a microservices API for a video-on-demand platform. Manages 1 million requests/day with CDN integration and dynamic bitrate switching. Stack: Go, gRPC, Kafka, Cloudflare.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote after the 2-week Roadmap phase. No hourly billing, no surprise invoices, no scope creep charges. The price you see is what you pay.
Senior engineers only
Every engineer at IRPR has 10+ years of experience. No juniors, no contractors. Your API is built by developers who have shipped production systems at scale.
Compliance built in
We embed HIPAA, PCI DSS, SOC 2, and GDPR controls from day one. API endpoints log access, encrypt data at rest, and use token-based authentication by default.
Documentation that ships with code
OpenAPI specs, Postman collections, and integration guides are part of every deliverable. Your team can start using the API within minutes of handoff.
12-week delivery guarantee
Our average timeline is 8-12 weeks for a custom API. We have shipped over 200 projects on time 98 percent of the time. We plan realistic schedules and stick to them.
Full code ownership
You own every line of code, every config file, every Docker image. There is no license fee, no vendor lock-in, no recurring royalty. The API is yours to do with as you please.
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.