Best REST API Development CompanyDevelopment Company
We build REST APIs that handle millions of requests monthly. Get a fixed-price quote in 2 weeks.
IRPR builds REST APIs for web and mobile apps using Node.js, Python, Go, and .NET. We design endpoints with OpenAPI 3.0 specs and secure them with OAuth 2.0 and JWT.
We ship production-ready APIs in 8-12 weeks with fixed pricing from $80K to $250K. All APIs pass PCI-DSS or HIPAA compliance audits where needed.
CTOs of SaaS companies hire us to replace slow legacy APIs. Product managers at fintech startups need PCI-compliant payment APIs. Engineering leads at healthcare firms require HL7 FHIR-compliant REST endpoints.
Types of software we ship.
Payment API
Stripe/Braintree wrapper for subscription billing, refunds, and tokenization. Idempotency keys prevent duplicate charges.
User Authentication API
OAuth 2.0 and JWT-based auth with MFA support. Social login via Google, GitHub, and Microsoft.
CRM Integration API
Sync contacts, deals, and activities between Salesforce, HubSpot, and custom apps via REST endpoints.
Data Ingestion API
Batch and streaming endpoints for CSV, JSON, and Avro data. Process 10,000+ records per second with Kafka.
Real-time Notification API
WebSocket-backed REST endpoints for push alerts. Firebase Cloud Messaging and Twilio SMS integration.
Geolocation API
IP-to-location, reverse geocoding, and distance calculations using Google Maps and OpenStreetMap data.
Ecommerce Product API
Catalog, inventory, and pricing endpoints with real-time sync. Supports Shopify and Magento backends.
Healthcare Patient API
HL7 FHIR R4 endpoints for patient records, appointments, and lab results. HIPAA-compliant audit logs.
We build for every business type.
SaaS platforms
Fintech
Healthcare
Ecommerce
Media & Content
Why choose IRPR for REST API development?
We have delivered 200+ REST APIs for clients in 50+ countries.
Each API is built with an OpenAPI contract first, ensuring clear specifications before any code is written. We integrate authentication, rate limiting, and monitoring by default.
We stress test every API with k6 for 10x target traffic and deploy on auto-scaling infrastructure. Our average MVP ships in 12 weeks with a fixed price.
IRPR vs generic dev shops
Most API projects fail due to poor documentation and security gaps.
Generic shops skip API contracts and produce undocumented endpoints that break in production. They lack rate limiting and monitoring, leading to downtime.
IRPR starts with an OpenAPI spec, builds security in from day one, and delivers a fully documented, monitored API on a fixed timeline.
- No API contract first
- Undocumented endpoints
- No rate limiting
- Downtime on scaling
- No monitoring
- Vague timelines
- OpenAPI spec before coding
- Auto-generated docs with Swagger
- Rate limiting + throttling built in
- Auto-scaling on AWS/GCP
- Datadog + Sentry monitoring
- Fixed timeline, 12 weeks or less
Our REST API development process
We follow a structured 4-phase process to deliver production-ready APIs.
In the Specification phase, we write an OpenAPI 3.0 contract and review endpoints with your team. This eliminates guesswork and rework.
During Development, we implement endpoints with unit tests, rate limiting, and security middleware. Deployment uses a CI/CD pipeline with automated load testing.
What ships with your REST API
Every project includes a complete delivery package, not just code.
You get everything needed to run, maintain, and extend the API independently. No proprietary tools, no hidden dependencies.
- OpenAPI 3.0 spec file
- Postman collection with examples
- Authentication middleware (JWT/OAuth)
- Rate limiting configuration
- Error logging (Sentry/Datadog)
- CI/CD pipeline (GitHub Actions)
- Load testing results (k6)
- Deployment scripts (Terraform)
- API documentation hosted (Redoc)
- Source code in your private repo
What we ship in this practice.
Payment API for fintech startup
Built a PCI-compliant payment API that processes 10,000 transactions/day. Stack: Node.js, Express, Stripe, PostgreSQL. Industry: Fintech.
Patient data API for telehealth
Created HL7 FHIR REST API reducing lab result delivery from 24hr to 10min. Stack: Python, FastAPI, FHIR, Snowflake. Industry: Healthcare.
Product API for ecommerce brand
Developed catalog API handling 500 SKUs with real-time inventory sync. Stack: Go, GraphQL (REST endpoints also), MySQL, Redis. Industry: Ecommerce.
CRM integration API for SaaS
Unified 3 CRM systems via REST API, saving 15 hrs/week manual data entry. Stack: Ruby on Rails, PostgreSQL, Zapier webhooks. Industry: SaaS.
Geolocation API for logistics
Built geo-lookup API for 1000+ daily shipment routing calls with 99.99% uptime. Stack: Python, Flask, Google Maps API, Aerospike. Industry: Logistics.
Notification API for media app
Designed push notification REST endpoint delivering 1M+ notifications/month with Sentry error tracking. Stack: Node.js, Firebase Cloud Messaging, Redis. Industry: Media.
Why teams hire us.
Fixed price, not hourly
Every REST API project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices.
OpenAPI contract first
We write the OpenAPI 3.0 spec before any code. You review and approve endpoints before development starts.
Security built in by default
All APIs include OAuth 2.0, rate limiting, input validation, and SQL injection prevention. For fintech: PCI-DSS; healthcare: HIPAA.
Scalable from day one
We deploy on AWS Lambda, ECS, or GCP Cloud Run with auto-scaling. Stress tested with k6 for 10x target traffic.
Full ownership, no lock-in
You own the source code, deployment scripts, and API documentation. No proprietary frameworks. Use any cloud provider.
98% on-time delivery
We have shipped 200+ API projects on time. Our Roadmap phase eliminates scope creep before coding begins.
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.