Best API Development FirmDevelopment Firm
We build production API systems for SaaS, fintech, and healthcare. 200+ products shipped, 98% on-time, fixed pricing from $80K.
IRPR builds REST, GraphQL, and gRPC APIs using Node.js, Go, and Python on cloud-native stacks like AWS, GCP, and Azure. We design every API for scale, security, and developer experience from day one.
Every API project ships in 8 to 12 weeks with a fixed price between $80,000 and $250,000. We handle compliance standards such as HIPAA, PCI-DSS, and SOC 2, and include load testing and monitoring by default.
Who hires us: CTOs launching a B2B SaaS API, fintech founders building payment APIs, healthcare companies needing HIPAA-compliant FHIR APIs, and enterprise teams modernizing legacy systems with internal microservices.
Types of software we ship.
REST API Development
Public REST APIs for SaaS platforms. Integrates with Stripe, Twilio, and SendGrid for payments, messaging, and email.
GraphQL API Development
GraphQL APIs for mobile and web clients using Apollo, Prisma, and TypeScript. Enables flexible data fetching and reduced payload.
gRPC API Development
High-performance gRPC services for microservices using Protobuf, Go, and Envoy. Ideal for internal service-to-service communication.
Webhook System Development
Event-driven webhook delivery systems with retry logic, idempotency keys, and real-time monitoring. Connects your app to external services.
Third-Party API Integration
Connect your platform to Salesforce, HubSpot, QuickBooks, or custom enterprise APIs. We handle OAuth, rate limiting, and data sync.
API Gateway Development
Build a centralized API gateway with rate limiting, authentication, logging, and caching using Kong or custom middleware.
Real-Time API Development
WebSocket and SSE APIs for live data: chat, notifications, dashboards, and collaborative editing. Built with Socket.IO or custom WebSocket servers.
Internal API Development
Private APIs for internal microservices with service mesh, distributed tracing, and RBAC. Designed for enterprise scalability and security.
We build for every business type.
Fintech
Healthcare
SaaS
Ecommerce
Logistics
Why IRPR is the best API development firm
Our track record speaks for itself.
We have shipped over 200 API-driven products for clients in 50+ countries. Our APIs handle millions of requests per day with 99.9% uptime.
Every project is delivered on time and on budget. We use a fixed-price model based on a detailed Roadmap phase (week 2).
How we differ from generic API shops
Most agencies build APIs that break under load. We build for production from day one.
Generic shops write code first, test later. We write OpenAPI specs first, then generate code.
IRPR assigns senior engineers with 10+ years experience. No junior developers.
- No OpenAPI spec before coding
- Junior developers on your project
- Hourly billing with no cap
- No load testing until launch
- No CI/CD pipeline
- Code ownership unclear
- OpenAPI-first design with spec review
- Senior engineers only (10+ yrs avg)
- Fixed price from Roadmap phase
- Load testing from week 4
- CI/CD with GitHub Actions and Sentry
- Full code ownership upon payment
Our API development process
We follow a proven 4-phase process.
Phase 1: Idea validation and technical discovery (1 week). Phase 2: Roadmap with OpenAPI spec, architecture, and fixed price (1 week).
Phase 3: Build sprints with weekly demos (6-10 weeks). Phase 4: Release with monitoring, documentation, and handover.
What ships with every API project
You get more than just code.
Every project includes a fully documented API, automated tests, and deployment pipelines.
- OpenAPI 3.0 specification document
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Sentry error tracking configured
- Datadog or CloudWatch monitoring
- Postman collection for testing
- Load test results report
- Architecture and deployment docs
- Admin dashboard or playground UI
- One year of basic support
What we ship in this practice.
Payment Processing API for Fintech Startup
Built a REST API handling 5000 transactions per second with Stripe integration and PCI-DSS compliance. Reduced payment failures by 40%.
FHIR API for Telemedicine Platform
Developed a HIPAA-compliant FHIR API connecting 20 clinics. Enabled real-time patient data exchange, reducing lab result wait times from 48h to 2h.
Subscription Management API for SaaS
Built a GraphQL API for a B2B SaaS with Stripe billing, usage metering, and webhook notifications. Managed 50k subscribers with 99.99% uptime.
Product Catalog API for Ecommerce
Created a REST API for a multi-vendor marketplace with Elasticsearch search, inventory sync, and Shopify integration. Supported 1M+ products.
Real-Time Tracking API for Logistics
Built a WebSocket API for live package tracking with geolocation and ETA predictions. Reduced customer support calls by 30%.
Internal Microservices API for Enterprise
Developed a gRPC-based internal API with service mesh, distributed tracing, and RBAC for a Fortune 500 company. Handled 10k requests per second.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Our team averages 10+ years of experience. No junior developers. Every engineer has shipped production APIs at scale.
OpenAPI-first design
We write the OpenAPI 3.0 specification before writing any code. This ensures your API is consistent, documented, and testable from day one.
Security and compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs. We include encryption, audit logs, and access controls by default.
Production monitoring from launch
Every API ships with Sentry error tracking, Datadog metrics, and uptime monitoring. We detect issues before your users do.
Full code ownership
You own all source code, documentation, and infrastructure. No lock-in. No recurring license fees.
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.