Leading Custom API Development ConsultantsAPI Development
We build production-grade APIs that scale. Get a fixed-price quote in week 2 with full code ownership.
IRPR builds custom APIs that connect systems, power applications, and move data securely. We use Node.js, Python, Go, and frameworks like Express, FastAPI, and Apollo for GraphQL, with Kafka for event streaming.
Every project ships in 8 to 12 weeks. Pricing ranges from $80K to $250K depending on complexity. We build to compliance standards including SOC 2, HIPAA, and PCI-DSS as needed.
CTOs scaling their platform hire us to build reliable integrations. Startup founders engage us to launch their MVP with a robust API. Enterprise teams bring us in to modernize legacy systems without disrupting operations.
Types of software we ship.
RESTful API
Stateless, cacheable endpoints with OpenAPI 3.0 docs. Built with Express or FastAPI for high throughput.
GraphQL API
Flexible data querying with Apollo Server. Reduces over-fetching and speeds up frontend development.
WebSocket API
Real-time bidirectional communication for chat, live updates, and streaming data. Uses Socket.io or native WebSocket.
gRPC API
High-performance RPC framework using Protocol Buffers. Ideal for microservices and low-latency internal systems.
Third-party API Integration
Connect your app to Stripe, Salesforce, HubSpot, or any public API. Handles auth, rate limits, and webhooks.
Public API Platform
Developer-facing API with documentation, key management, and usage analytics. Ships with Portal and SDKs.
Internal Microservices API
API gateway with service discovery, circuit breakers, and monitoring. Built on Kong, NGINX, or Envoy.
Event-Driven API
Async APIs using Kafka or RabbitMQ for event streaming. Patterns include CQRS and event sourcing.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS & Enterprise
Logistics & Supply Chain
Custom API development consultants by the numbers
Our track record shows what a focused team can deliver.
IRPR has shipped over 200 software products across 50 countries. Our API projects average 12 weeks from kickoff to production deployment.
We maintain a 98% on-time delivery rate. Every API we build includes automated testing and monitoring to ensure 99.9% uptime.
What makes IRPR different from other API consultants
Not every team delivers the same quality. Here is how we compare.
Generic development shops often start coding without a clear roadmap. They invoice hourly and change scope.
IRPR gives you a fixed price and a detailed Roadmap in week 2. You own the code from day one.
- No fixed price - hourly billing adds 40% more cost
- Junior developers learning on your project
- No clear roadmap - scope creep is common
- You do not own the final source code
- No compliance expertise (SOC 2, HIPAA)
- No monitoring or post-launch support
- Fixed price quoted in week 2, never changes
- Senior engineers with 15+ years experience
- Detailed Roadmap with wireframes and costs
- Full source code in your repository
- Built to SOC 2, HIPAA, or PCI-DSS standards
- Sentry error tracking and Datadog monitoring included
Our API development process in 4 phases
We follow a proven framework to reduce risk and deliver on time.
Every project starts with a two-week Discovery phase where we define your requirements. Then we build a detailed Roadmap with a fixed price before any code is written.
The Product phase executes that plan in 8-12 weeks. We deploy to production in the Release phase with full documentation and monitoring.
What ships with your custom API
Every project includes these deliverables by default.
- Source code in your private GitHub repository
- CI/CD pipeline with GitHub Actions or GitLab CI
- API documentation (OpenAPI 3.0 / Swagger UI)
- Postman collection for testing and demos
- Unit and integration tests (95%+ coverage)
- Sentry error monitoring and Datadog metrics
- Deployment runbook and architecture diagram
- Admin dashboard for key management and usage logs
- 30-day post-launch support and bug fixes
- One hour of live training for your engineering team
What we ship in this practice.
Payment processing API for fintech startup
Built a RESTful API that connects to Stripe and Plaid. Reduced transaction failures by 30% and cut payment latency by 2 seconds. Tech stack: Node.js, PostgreSQL, Redis.
Patient data exchange API for hospital network
Created a FHIR-compliant API for EHR interoperability. Automated 50% of manual data entry and saved 8 hours per week per clinician. Tech stack: Python, FastAPI, HL7, HIPAA compliance.
Inventory sync API for ecommerce marketplace
Developed a GraphQL API that syncs inventory across 3 warehouses and 2 sales channels. Cut sync time from 15 minutes to 10 seconds. Tech stack: Apollo Server, Node.js, MongoDB.
Customer portal API for SaaS platform
Built a public REST API with key management and rate limiting. Reduced partner integration time from 6 weeks to 2 days. Tech stack: FastAPI, PostgreSQL, Kong API Gateway.
Real-time tracking API for logistics company
Engineered a WebSocket API for GPS tracking and ETA updates. Handled 10,000 concurrent connections with 99.9% uptime. Tech stack: Go, WebSocket, Redis Pub/Sub.
Media asset management API for streaming service
Created a gRPC API for transcoding pipeline. Reduced video processing time by 40% and supported 4K resolution. Tech stack: C++, Protocol Buffers, Kubernetes.
Why teams hire us.
Fixed price, not hourly billing
Every project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only (15+ years)
Our team averages 15 years of experience. No junior developers. Every engineer has deployed production-grade APIs for companies of all sizes.
Full code ownership from day one
You own everything we build. Source code, documentation, CI/CD scripts, and infrastructure as code are all in your repositories.
12-week delivery guarantee
We ship in 8-12 weeks or we adjust scope at no extra cost. Our process has delivered on time for 98% of projects.
Compliance built in (SOC 2, HIPAA, PCI)
We design APIs to meet industry standards from the start. You get audit-ready documentation and secure architecture patterns.
We ship production, not prototypes
Your API goes straight to production with monitoring, error tracking, and automated tests. You get a deployment runbook and live training.
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.