Best API Development ServicesAPI Development
We build production-grade APIs that power your product. 200+ products shipped, 8-12 week delivery, fixed pricing.
IRPR builds the best API development services for companies that need reliable, scalable, and secure integrations. We use Node.js, Python, Go, and Rust to design REST and GraphQL APIs with OpenAPI 3.0 specs and automated testing via Postman and Jest.
A typical API project ships in 8-12 weeks with a fixed price between $80K and $250K. Every API includes rate limiting, JWT authentication, Swagger documentation, and a CI/CD pipeline on GitHub Actions. We comply with HIPAA, PCI-DSS, and SOC 2 where required.
We work with CTOs who need a secure backend for a SaaS product, product managers integrating third-party services like Stripe or Salesforce, and founders launching an MVP with a custom API layer. Our senior engineers take full ownership from design to deployment.
Types of software we ship.
REST API Development
Build stateless RESTful APIs with JSON responses, versioning, and HATEOAS links. Use Express.js or FastAPI.
GraphQL API Development
Design GraphQL schemas with Apollo Server or Yoga. Support queries, mutations, subscriptions, and resolvers.
Third-Party API Integration
Connect your app to Stripe, Salesforce, HubSpot, Slack, or Twilio. Handle webhooks, OAuth 2.0, and error retries.
Microservices API Gateway
Deploy an API gateway with Kong or NGINX. Route traffic, enforce rate limits, and aggregate responses from multiple services.
Real-Time API (WebSocket)
Build real-time APIs using WebSocket or Server-Sent Events. Use Socket.IO or Pusher for live chat, notifications, or dashboards.
Internal API for Enterprise
Create private APIs for internal tools and data exchange between departments. Include role-based access control and audit logs.
Public API / Developer Portal
Launch a public API with developer documentation, API keys, usage analytics, and a sandbox environment using Redoc or Stoplight.
Data API / ETL Pipeline
Build APIs that extract, transform, and load data from databases, CRMs, or flat files. Use Airflow or dbt for orchestration.
We build for every business type.
SaaS and cloud platforms
Fintech and payments
Healthcare and life sciences
Ecommerce and retail
Logistics and real estate
Why IRPR delivers the best API development services
Our API projects ship faster, cost less, and run reliably because we follow a proven process.
Every API starts with a detailed specification in OpenAPI 3.0. We write automated tests before writing production code. This catches 90% of integration bugs before they reach staging. Our engineers have built APIs for companies processing over 1 million requests per day.
We use a fixed-price model based on the Roadmap phase. You know the exact cost and timeline by week 2. No hourly billing. No scope creep. No surprises. We also provide 30 days of free production support after launch.
The difference between IRPR and a generic dev shop
Most API agencies rush to code without a spec. We do the opposite.
Generic shops often start coding immediately, skip documentation, and hand over a black box. You inherit tech debt and no tests. IRPR writes a full OpenAPI spec first, builds automated tests, and delivers documented, deployable code.
Our engineers are senior-level only. No junior developers. No offshore outsourcing. Every API is built in-house by engineers with 8+ years of experience. We also include a CI/CD pipeline, monitoring with Sentry, and logging with Datadog.
- No API specification upfront
- Hourly billing with no cap
- Junior or offshore developers
- No automated tests
- No documentation delivered
- No post-launch support
- OpenAPI 3.0 spec before code
- Fixed price from week 2
- Senior engineers only (8+ years)
- Automated test suite with Jest
- Swagger/Redoc documentation
- 30 days free production support
How we build your API in 4 phases
Our process turns your idea into a production-grade API in 8 to 12 weeks.
Each phase has a clear deliverable. You review and approve before we move forward. This eliminates rework and keeps the project on schedule.
We use agile sprints with weekly demos. You see working code every 7 days. No waiting until the end to discover issues.
What ships with every API project
You own everything. No black boxes. No hidden dependencies.
Every deliverable is production-ready and documented. You can hand it to any internal team or deploy it yourself.
We also include a runbook for operations, so your team knows how to monitor, scale, and troubleshoot the API.
- Full source code in your GitHub repo
- OpenAPI 3.0 specification file
- Automated test suite (Jest, Postman collection)
- CI/CD pipeline on GitHub Actions
- Dockerized deployment with docker-compose
- API documentation (Swagger UI or Redoc)
- Monitoring setup with Sentry and Datadog
- Rate limiting and authentication (JWT or API keys)
- Runbook for operations and scaling
- 30 days free production support
What we ship in this practice.
Payment gateway API for a fintech startup
Built a PCI-DSS compliant REST API that processes 50,000 transactions per day. Integrated with Stripe and Plaid. Reduced payment failure rate by 30%. Tech stack: Node.js, Express, PostgreSQL, Stripe API, Plaid API.
Patient data exchange API for a telemedicine platform
Developed a HIPAA-compliant GraphQL API that syncs patient records between clinics and labs. Handles 10,000 records per hour with end-to-end encryption. Tech stack: Python, FastAPI, GraphQL, AWS KMS, FHIR.
Inventory sync API for a multi-vendor marketplace
Created a real-time REST API that syncs inventory across 200 vendors using Shopify and WooCommerce. Eliminated overselling and reduced manual updates by 15 hours per week. Tech stack: Node.js, Redis, Shopify API, WooCommerce API.
CRM integration API for a SaaS company
Built a bidirectional sync API connecting the SaaS platform with Salesforce and HubSpot. Synced 500,000 contacts in under 2 minutes. Tech stack: Python, Django, Salesforce REST API, HubSpot API, Celery.
MLS data feed API for a real estate platform
Developed a data API that ingests and normalizes MLS listings from 50 regional databases. Reduced listing update latency from 24 hours to 15 minutes. Tech stack: Go, PostgreSQL, RabbitMQ, AWS Lambda.
Shipment tracking API for a logistics company
Built a WebSocket-based real-time tracking API that processes 1 million location pings per day. Integrated with FedEx and UPS APIs. Reduced customer support calls by 40%. Tech stack: Node.js, Socket.IO, MongoDB, FedEx API, UPS API.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost upfront.
Senior engineers only
We hire no junior developers. Every engineer has 8+ years of experience building production APIs. Our team includes contributors to open-source projects like Express and FastAPI.
OpenAPI spec before code
We write a complete OpenAPI 3.0 specification and get your approval before writing a single line of production code. This eliminates rework and ensures alignment.
Automated testing included
Every API ships with an automated test suite covering unit, integration, and end-to-end tests. We use Jest, Postman, and Newman. Test coverage is above 90%.
Production support included
You get 30 days of free production support after launch. We monitor your API, fix bugs, and handle deployment issues. No extra cost.
Full ownership of code
You own all source code, documentation, and infrastructure scripts. No lock-in. No licensing fees. You can deploy anywhere or hand it to your internal team.
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.