Best API Development CompanyAPI Development
We build custom APIs that connect your apps and data. 200+ products shipped, fixed pricing, 8-12 week delivery.
IRPR is the best API development company for teams that need reliable, scalable APIs. We build REST, GraphQL, gRPC, and WebSocket APIs using Node.js, Go, Python, and .NET. Every API gets automated testing, rate limiting, and monitoring from day one.
Most API projects ship in 8-12 weeks. Pricing ranges from $80K to $250K fixed, no hourly billing. We handle compliance for HIPAA, PCI-DSS, SOC 2, and FERPA. Your team owns the code and the infrastructure.
Who hires us: CTOs who need to replace a slow legacy API, product managers launching a new integration with Salesforce or Stripe, and founders building a multitenant SaaS platform that needs robust authentication and usage tracking.
Types of software we ship.
REST API Development
Build stateless, resource-oriented APIs with JSON responses. Use OpenAPI 3.0 for documentation and Postman for testing.
GraphQL API Development
One endpoint, flexible queries. Use Apollo Server with Node.js or Hasura for real-time subscriptions and schema stitching.
Third-Party API Integration
Connect your app to Salesforce, HubSpot, Stripe, QuickBooks, or Slack. Handle OAuth 2.0 flows and webhook retries.
Microservices API Gateway
Centralize authentication, rate limiting, and logging with Kong, Envoy, or AWS API Gateway. Route traffic to 10+ services.
Real-Time API (WebSockets)
Build persistent connections for chat, notifications, live dashboards. Use Socket.IO or WebSocket with Redis Pub/Sub.
Async API / Event-Driven
Decouple services with message queues like RabbitMQ or AWS SQS. Use Kafka for high-throughput event streaming.
Internal API / B2B API
Create private APIs for your partners or internal teams. Enforce API keys, JWT, or mutual TLS. Document with Swagger.
Serverless API Development
Deploy functions on AWS Lambda or GCP Cloud Run. Auto-scale from zero to thousands of requests per second.
We build for every business type.
Fintech
Healthcare
Ecommerce
SaaS
Enterprise
Why Metrics Matter in API Development
Every API we build ships with measurable performance guarantees.
IRPR tracks four key metrics across every project. Our APIs average 99.9% uptime over 12 months. Response times stay under 200ms for 95% of requests. We document every endpoint using OpenAPI 3.0 so your team can test in Swagger or Postman.
Integration tests cover 95% of API paths. We deploy to staging within 2 weeks of kickoff. Clients receive a Grafana dashboard with real-time latency, error rates, and request counts.
How We Compare to Other API Development Shops
Most agencies bill hourly and skip testing. IRPR delivers fixed-price, tested APIs.
Generic shops often start coding before requirements are clear. They use hourly billing that punishes efficiency. Documentation is an afterthought. Post-deployment support is vague.
IRPR starts with a Roadmap phase where we define every endpoint, data model, and error code. You get a fixed price and a 98% on-time delivery rate. We write tests before code.
- hourly billing, no cap
- no API documentation until the end
- no automated tests
- no rate limiting or throttling
- no monitoring or alerting
- no post-launch SLA
- fixed price, no surprises
- OpenAPI 3.0 docs written during Roadmap
- 95%+ test coverage before production
- rate limiting, JWT auth, and CORS configured
- Grafana + Sentry monitoring on day one
- 99.9% uptime SLA with 24/7 support
Our API Development Process: 4 Phases
From idea to production in 8-12 weeks.
Every project follows a proven 4-phase process. Each phase ends with a deliverable you can review and approve. No ambiguity, no scope creep.
You get weekly demos and a Slack channel with the full engineering team. Changes are handled through a clear change log.
What Ships With Every API Project
Every deliverable is concrete and usable by your team.
You don't get a black box. Every API project includes full source code, infrastructure as code, and runbooks. Your team can deploy and maintain the API without IRPR after handoff.
- Full source code in your GitHub repo
- OpenAPI 3.0 documentation (YAML/JSON)
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions or GitLab CI
- Unit and integration tests with 95% coverage
- Dockerized local development environment
- Grafana dashboard with uptime, latency, error rate
- Sentry error tracking with alerts
- Rate limiting and JWT authentication configured
- Deployment runbook and architecture diagram
What we ship in this practice.
Payment API for Fintech Startup
Built a RESTful payment API that processes 10,000 transactions per hour. Integrated with Stripe Connect for merchant onboarding. Tech stack: Node.js, PostgreSQL, Redis, AWS Lambda. Reduced payment failure rate by 40%.
Patient Data API for Telehealth Platform
Created a HIPAA-compliant API that syncs patient records between EHR and mobile app. Used FHIR standards and AWS HealthLake. Cut data entry time by 12 hours per week.
Inventory API for 3PL Warehouse
Developed a real-time inventory API with WebSocket push updates. Connected to WMS and Shopify. Handles 500 requests/second during peak season. 99.95% uptime.
Subscription Billing API for SaaS
Built a multi-tenant billing API supporting 10 price tiers. Integrated with Stripe and Chargebee. Reduced billing errors by 90% and churn by 15%.
CRM Sync API for Real Estate Brokerage
Built a bidirectional sync between MLS and Salesforce. Used GraphQL for flexible querying and RabbitMQ for event-driven updates. Agents saved 8 hours per week on data entry.
Monitoring API for IoT Manufacturing
Developed a WebSocket API that streams sensor data from 500 machines. Architecture: Go, TimescaleDB, MQTT. Detected anomalies within 2 seconds, reducing downtime by 30%.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote during the Roadmap phase (week 2). No hourly billing, no rate creep, no surprise invoices. You know the cost before any code is written.
Senior engineers only
Every developer at IRPR has 8+ years of experience. No junior contractors, no offshore teams. Your API is built by engineers who have shipped at AWS, Google, and Stripe.
Documentation from day one
OpenAPI 3.0 specification is written during the Idea phase. You see every endpoint, request body, and error code before we write a line of production code. No guessing.
Own your full codebase
After launch, you own the entire codebase, infrastructure as code, and CI/CD pipeline. No proprietary frameworks, no licensing fees. You can take the API to any other team.
Built for compliance
We have delivered APIs under HIPAA, PCI-DSS, SOC 2, and FERPA. We implement audit logs, encryption at rest, and RBAC out of the box. Your legal team will approve.
98% on-time delivery
Across 200+ projects, IRPR has delivered 98% on or before the agreed timeline. We use weekly sprint demos and a shared roadmap so you see progress in real time.
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.