Best REST API Development FirmREST API
We build production-grade REST APIs for B2B SaaS, fintech, and healthcare. Ships in 8-12 weeks with fixed pricing.
IRPR builds REST APIs for B2B products using Node.js, Go, or Python with PostgreSQL, Redis, and RabbitMQ. We design endpoints around your domain logic, not frameworks.
Every project ships in 8-14 weeks with a fixed price between $80K and $250K. We handle compliance (HIPAA, PCI-DSS, SOC 2) and deploy on AWS ECS or Kubernetes.
CTOs scaling their API platform, product managers launching a SaaS with external integrations, and engineering directors rebuilding legacy APIs hire us.
Types of software we ship.
Mobile backend API
REST API for iOS and Android apps. Includes push notifications via Firebase, offline sync, and user auth with JWT.
Web frontend API
RESTful endpoints for React, Vue, or Angular SPAs. Built with caching (Redis) and GraphQL-to-REST bridges.
Third-party integration API
Public REST API for partners and customers. Includes API keys, rate limiting, and auto-generated docs via Swagger.
Internal microservice API
Backend-to-backend REST APIs for service meshes. Designed for low latency with RabbitMQ event streaming.
IoT device API
REST API for sensor data ingestion and device management. Handles 10K+ requests/second with MQTT fallback.
Data aggregation API
Unifies data from multiple sources (SQL, NoSQL, SFTP) into a single REST interface. Includes ETL pipelines in Python.
Payment gateway API
PCI-DSS compliant REST API for transactions, refunds, and webhooks. Integrates Stripe, Braintree, or Adyen.
AI/ML model serving API
REST endpoints for inference and training. Deployed with TensorFlow Serving or PyTorch on Kubernetes.
We build for every business type.
Fintech
Healthcare
SaaS
Ecommerce
Enterprise
Why the best firms choose IRPR for REST API development
We have shipped over 200 REST APIs across 50 countries.
Our clients pick us because we deliver production-grade code on time. We use the same tools that top engineering teams use: OpenAPI 3.0, Go, Node.js, PostgreSQL, and Redis.
Every API comes with automatic docs, rate limiting, and monitoring. You get a Postman collection and a Datadog dashboard on day one.
How we compare to generic API shops
Most dev shops treat APIs as afterthoughts. We design them as products.
Generic shops often skip versioning, documentation, and monitoring. They deliver endpoints that work for the demo but break under load.
IRPR builds APIs with OpenAPI-first design, automated tests, and observability. We treat each API as a long-lived product.
- No API versioning strategy
- No rate limiting or throttling
- No documentation until after launch
- No monitoring or alerting
- No security review (OWASP)
- No compliance (HIPAA/PCI)
- OpenAPI 3.0 spec written before code
- Built-in rate limiting per client
- Auto-generated Swagger docs
- Datadog and Sentry monitoring on day one
- OWASP top 10 checks in CI/CD
- HIPAA and PCI DSS compliance baked in
Our REST API development process
We follow a four-phase build: Roadmap, Product, Release, Iterate.
Each phase has clear deliverables and sign-off gates. You see the OpenAPI spec before a single line of code is written.
Security and performance audits happen before release. We k6 load test every endpoint and review logs for vulnerabilities.
What ships with every REST API
Beyond endpoints, you get a production-ready system.
Every delivery includes documentation, monitoring, and deployment scripts. No manual steps required to run in production.
- OpenAPI 3.0 spec file
- Postman collection with example requests
- CI/CD pipeline (GitHub Actions or GitLab CI)
- Rate limiting per API key
- JWT or OAuth 2.0 authentication
- Consistent error responses with RFC 7807
- Database schema migration scripts
- Sentry error tracking integration
- Datadog monitoring dashboard
- Unit and integration test suite (80%+ coverage)
What we ship in this practice.
Payment gateway API
Built a PCI-compliant REST API for a fintech startup processing $2M/month. Reduced transaction failure rate by 30% using idempotency keys. Tech stack: Go, PostgreSQL, Stripe Connect.
Healthcare data exchange API
Developed a HL7 FHIR REST API for a telehealth platform that handles 50K patient records. Achieved HIPAA compliance with audit logging and encryption. Tech stack: Python, FastAPI, PostgreSQL.
CRM integration API
Created a REST API to sync contacts and deals between HubSpot and a custom CRM. Eliminated 15 hours per week of manual data entry. Tech stack: Node.js, Redis, Salesforce REST connector.
Ecommerce inventory API
Built a real-time inventory API for a retailer with 200+ stores. Reduced stockouts by 40% using WebSocket push and optimistic concurrency. Tech stack: Node.js, MongoDB, RabbitMQ.
Real estate MLS API
Designed a RESTful API to aggregate listings from 10+ MLS sources. Cut data ingestion time from 4 hours to 15 minutes. Tech stack: Python, PostgreSQL, Apache Airflow.
IoT device management API
Developed a REST API to manage 10K+ connected sensors with firmware updates and status monitoring. Achieved 99.9% uptime with automatic failover. Tech stack: Go, PostgreSQL, MQTT bridge.
Why teams hire us.
Fixed price, not hourly
Every REST API project gets a fixed quote in the Roadmap phase. No surprise invoices, no time tracking. You know the cost before we start.
OpenAPI-first design
We write the OpenAPI spec before we write code. You review and approve the contract between frontend and backend before development starts.
Security baked in
We include OWASP top 10 checks, rate limiting, and automatic SSL termination on every deployment. We test for vulnerabilities in CI/CD.
Compliance ready
We have built HIPAA and PCI DSS compliant APIs. Our checklist covers audit logging, encryption at rest and in transit, and access control.
Own your code
You get full source code ownership from day one. No license fees, no vendor lock-in. The repo is yours on GitHub.
Production monitoring
We set up Datadog and Sentry for every API. You get dashboards, error alerts, and a runbook on day one.
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.