Experienced Custom API Development FirmCustom API
We build APIs that connect your systems and serve your customers. Our team has shipped 200 plus integrations across 50 countries.
IRPR is an experienced custom API development firm. We design and build REST, GraphQL, and gRPC APIs using Node.js, Python, Go, and AWS API Gateway. Every API ships with auto-generated OpenAPI 3.0 documentation and a Postman collection.
A typical API project takes 8 to 12 weeks from kickoff to production. Pricing runs from $60,000 to $150,000 depending on endpoints, integrations, and compliance requirements. We support HIPAA, PCI-DSS, SOC 2, and GDPR out of the box.
CTOs hire us to integrate legacy systems with modern platforms. Product managers engage us to launch API-first products. Enterprise architects trust us for secure microservice decomposition. Startups work with us to build their B2B API in under 12 weeks.
Types of software we ship.
Public REST API
External facing endpoints for partners and customers. Includes API keys, rate limiting, and caching via Redis.
Internal Microservice API
Async or sync communication between services. Uses NATS, RabbitMQ, or Kafka for event driven flows.
GraphQL API
Single endpoint with flexible queries. Built with Apollo Server and integrated with React or mobile clients.
Webhook / Event API
Real time event notifications to third party systems. Handles retries, idempotency keys, and logging with Sentry.
API Gateway
Centralized routing, authentication, and throttling layer. Configured on AWS API Gateway or Kong with custom plugins.
Data API
Read only or write optimized endpoints for analytics dashboards. Connects to PostgreSQL, BigQuery, or Snowflake.
File Upload API
Multipart uploads with chunking and virus scanning. Stores files in S3 or GCS and returns signed URLs.
Authentication API
OAuth 2.0, OpenID Connect, and SAML based login flows. Integrates with Auth0, Okta, or custom JWT issuers.
We build for every business type.
Fintech
Healthcare
Ecommerce
SaaS
Enterprise
Why choose an experienced custom API development firm
Building a production grade API requires more than code. It needs design, security, and operations experience.
IRPR has delivered 200 plus API projects across 50 countries. Each API goes through schema design review, automated testing, and load simulation before release. Our clients reduce integration time by up to 60 percent compared to in house builds.
We follow the OpenAPI 3.0 standard for every endpoint. This means you get machine readable documentation, client SDK generation, and contract testing from day one. No surprises during integration.
Generic dev shop vs. experienced API development firm
The difference between a hobby project and a business critical API is in the details.
We see the aftermath of APIs built by generalist shops. Missing rate limiting, no documentation, and silent failures. Those APIs cost more to maintain than to build.
IRPR builds APIs for production from the first commit. We design for failure, monitor everything, and hand over a complete system your team can operate.
- No API documentation
- No rate limiting
- No monitoring or alerts
- Hourly billing with scope creep
- No post launch support
- Security added as an afterthought
- OpenAPI 3.0 docs generated automatically
- Rate limiting and caching built in
- CloudWatch and Prometheus monitoring
- Fixed price contracts with clear scope
- 30 day post launch support included
- OWASP Top 10 compliance from day one
Our API development process in 4 phases
Every API project follows the same proven roadmap to keep delivery predictable.
We use the Idea, Roadmap, Product, Release framework. Each phase has clear deliverables and a go/no go gate.
You know exactly what you get and when you get it. No ambiguity, no guesswork.
What ships with every custom API project
Every deliverable is production ready. No loose ends.
We include everything needed for your team to maintain and extend the API on day one.
- OpenAPI 3.0 specification
- Postman collection with examples
- CI/CD pipeline with automated tests (GitHub Actions)
- Error tracking with Sentry
- Centralized logging (ELK stack)
- Rate limiting and request throttling
- Authentication middleware (JWT / OAuth2)
- Load testing report (k6 / Artillery)
- Source code in your GitHub repo
- Deployment playbook and runbook
What we ship in this practice.
Payment Gateway API for a Fintech Startup
Built a REST API that processes 10,000 transactions per minute. Integrated with Stripe and Plaid, reducing payment integration time by 70 percent. Stack: Node.js, Redis, PostgreSQL.
EHR Integration API for a Telehealth Platform
Created a HIPAA compliant API to sync patient records with Epic and Cerner. Eliminated 8 hours of manual charting per provider per week. Stack: Python, FHIR, AWS Lambda.
Real time Inventory API for an Ecommerce Brand
Developed a GraphQL API that updates inventory across 3 warehouses and a Shopify store in under 2 seconds. Cut stockout incidents by 40 percent. Stack: Apollo Server, DynamoDB, WebSockets.
CRM Sync API for a B2B SaaS Company
Designed a bidirectional sync API between the SaaS product and Salesforce. Handles 500,000 records daily with conflict resolution. Stack: Django, Celery, Kafka.
Shipping Rate API for a Logistics Provider
Built a high throughput API that aggregates rates from 8 carriers (UPS, FedEx, USPS) with caching. Reduced rate lookup latency by 60 percent. Stack: Go, Redis, AWS ElastiCache.
Multi Language Content API for a Media Platform
Created a REST API serving localized content for 12 languages with CDN caching. Improved page load time by 3 seconds for international users. Stack: Next.js, Strapi, CloudFront.
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.
OpenAPI first development
We write the spec before any code. This catches design issues early and gives you a contract that SDK generators and documentation tools can use.
Production grade testing
Every endpoint gets unit tests, integration tests, and a load test that simulates 10x your expected traffic. We include the results in your handover.
Monitoring out of the box
We configure CloudWatch metrics, Sentry error alerts, and uptime monitors as part of every project. You get a Slack channel that warns you before users notice problems.
Compliance built in, not bolted on
HIPAA, PCI-DSS, SOC 2, and GDPR requirements are addressed from the architecture phase. We have delivered compliant APIs for hospitals, banks, and insurers.
Full source code ownership
You own every line of code we write. No licensing fees, no vendor lock in. Deploy the API anywhere, on your own cloud account.
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.
─── share this page ───
