Expert REST API Development DevelopersREST API
We build custom REST APIs that handle millions of requests per day. Fixed price, 12 weeks to production.
IRPR builds production-grade REST APIs for SaaS platforms, mobile backends, and enterprise integrations. We use Node.js, Python (FastAPI), Go, and PostgreSQL to deliver APIs that scale from 100 to 10 million requests per day.
Every project ships in 8-12 weeks with fixed pricing from $80K to $250K. We handle authentication (JWT, OAuth2), rate limiting, caching (Redis), and compliance (SOC 2, HIPAA, PCI-DSS) out of the box.
We work with CTOs launching new products, engineering leads modernizing legacy systems, product managers needing a scalable backend for mobile apps, and startup founders building MVP APIs for investor demos.
Types of software we ship.
RESTful API for SaaS Platforms
Multi-tenant API with user auth, billing webhooks (Stripe), and role-based access control. Built on Node.js + PostgreSQL.
Mobile Backend API
REST API for iOS/Android apps with push notifications (Firebase), file uploads (S3), and real-time data via WebSockets.
Third-Party Integration API
API that connects your platform to Salesforce, HubSpot, Slack, or custom endpoints. Handles OAuth, rate limits, and data sync.
Payment Processing API
PCI-compliant REST API for payment flows using Stripe, Braintree, or Adyen. Includes idempotency keys and webhook retries.
Data Aggregation API
API that pulls data from multiple sources, transforms it, and serves unified JSON responses. Uses Redis caching and async workers.
Admin Dashboard API
REST endpoints for internal tools and dashboards – user management, analytics, reporting. Built with FastAPI and PostgreSQL.
IoT Device API
REST API for collecting sensor data, device commands, and status reports. Supports MQTT bridge and time-series databases.
Ecommerce API
Headless commerce API with product catalog, cart, checkout, and order management. Integrates with Shopify or custom frontends.
We build for every business type.
SaaS and Cloud Platforms
Mobile and Web Apps
Enterprise Integrations
Ecommerce and Retail
Healthcare and Fintech
Why Expert REST API Development Developers Matter
A poorly designed REST API breaks under load and costs 10x more to fix later.
IRPR builds REST APIs that handle 10,000+ requests per second with 99.9% uptime. We use proper HTTP verbs, status codes, and pagination from day one. Every endpoint is documented with OpenAPI 3.0 and tested with automated suites.
Our developers have shipped APIs for fintech platforms processing $50M+/month and healthcare systems handling 1M+ patient records. We enforce rate limiting, input validation, and idempotency on every write endpoint.
Generic Dev Shop vs IRPR
Most agencies write REST APIs that work in demo but fail under real traffic.
Generic shops often skip caching, use inconsistent naming, and deliver without documentation. Their APIs break when traffic spikes and require months of rewrites.
IRPR delivers production-ready REST APIs with caching (Redis), error tracking (Sentry), and monitoring (Datadog) built in from week one. We write unit tests, integration tests, and load tests before we ship.
- No rate limiting – API crashes under load
- Inconsistent endpoint naming (/getUser, /fetchUser)
- No OpenAPI documentation
- No caching – every request hits the database
- No monitoring – you don't know when it breaks
- Hourly billing – costs balloon without warning
- Rate limiting + throttling out of the box
- Consistent RESTful naming (GET /users, POST /users)
- OpenAPI 3.0 docs auto-generated
- Redis caching layer reduces DB load by 80%
- Sentry + Datadog monitoring on day one
- Fixed price from $80K – no surprises
Our REST API Development Process
We follow a 4-phase process that delivers a working API in 8-12 weeks.
Phase 1 (Idea): We map your endpoints, data models, and integration points. You get a detailed API specification and a fixed price quote.
Phase 2 (Roadmap): We set up the development environment, CI/CD pipeline, and database schema. You see the first endpoints working within 2 weeks.
What Ships With Your REST API
Every project includes these deliverables by default.
We don't just deliver code. You get a fully documented, monitored, and deployable REST API with everything needed to run in production.
- Source code in your private GitHub/GitLab repo
- CI/CD pipeline with GitHub Actions or GitLab CI
- OpenAPI 3.0 specification (YAML/JSON)
- Postman collection with example requests
- Unit tests covering 90%+ of endpoints
- Integration tests for critical flows (auth, payments)
- Load test results (k6 or Artillery) showing throughput
- Deployment scripts for AWS ECS or GCP Cloud Run
- Sentry error tracking configured
- Datadog dashboard with latency and error metrics
What we ship in this practice.
Fintech Payment API
Built a REST API for a lending platform that processes $50M in transactions monthly. Used Node.js, PostgreSQL, and Stripe. Reduced payment failure rate by 40% with idempotency keys.
Healthcare Patient Portal API
Developed a HIPAA-compliant REST API for a telemedicine app. Handles 1M+ patient records with FHIR data models. Uses Python FastAPI, PostgreSQL, and AWS KMS for encryption.
Ecommerce Inventory API
Created a REST API for a multi-warehouse inventory system. Integrates with Shopify and NetSuite. Reduced stock discrepancies by 95% using real-time sync with Redis pub/sub.
SaaS Multi-Tenant API
Built a multi-tenant REST API for a B2B SaaS platform. Supports 500+ tenants with isolated data per tenant. Uses Node.js, PostgreSQL row-level security, and Stripe billing webhooks.
Real Estate MLS API
Developed a REST API that aggregates MLS listings from 50+ sources. Serves 10M+ property records with geospatial queries. Uses Go, PostgreSQL with PostGIS, and Redis caching.
Logistics Tracking API
Built a REST API for a logistics company to track 100K+ shipments daily. Integrates with FedEx, UPS, and USPS APIs. Reduced manual tracking time by 80% using webhook polling.
Why teams hire us.
Fixed price, not hourly
Every REST API project gets a fixed quote during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Every developer on your project has 8+ years of experience building REST APIs. We don't outsource to juniors. You work directly with the team.
Production-ready from day one
Your API ships with caching, monitoring, error tracking, and automated tests. We don't deliver prototypes – we deliver production systems.
Compliance built in
We handle HIPAA, PCI-DSS, SOC 2, and GDPR requirements as part of the standard build. No add-on fees for compliance work.
Full code ownership
You own every line of code. We deliver the source code in your repo, with no licensing fees or ongoing royalties.
Async-first, global team
Our team works across 6 time zones, so your project moves forward 24/7. We communicate via Slack and Notion with daily standups in writing.
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.
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