Experienced Custom API Development VendorAPI Development
We build production-grade APIs for SaaS platforms, fintech apps, and healthcare systems. 8-12 week delivery with fixed pricing.
IRPR is an experienced custom API development vendor that builds APIs for web apps, mobile backends, and microservices. We use Node.js, Python, Go, and Java with PostgreSQL, Redis, and Kafka for data pipelines.
Every API ships with OpenAPI 3.0 docs, automated tests (Jest, Pytest), and CI/CD via GitHub Actions. Timeline is 8-12 weeks for an MVP. Fixed pricing starts at $80K and goes to $250K for complex integrations. We comply with HIPAA, PCI-DSS, and SOC 2.
We work with CTOs who need a scalable API for their SaaS product, engineering leads integrating third-party services like Stripe or Salesforce, and product owners building internal APIs for data exchange between legacy systems.
Types of software we ship.
REST API development
Build stateless RESTful APIs with JSON payloads. Use Express.js, FastAPI, or Spring Boot. Includes rate limiting and caching.
GraphQL API development
Create flexible GraphQL APIs with Apollo Server or Hasura. Clients query exactly what they need. Reduces over-fetching.
gRPC API development
High-performance gRPC APIs using Protocol Buffers. Ideal for microservices communication. Supports streaming and bidirectional calls.
Webhook API development
Build event-driven webhook systems that push data to Slack, Stripe, or custom endpoints. Includes retry logic and idempotency.
API integration services
Connect your app to third-party APIs like Salesforce, HubSpot, Shopify, or QuickBooks. Handle OAuth 2.0, rate limits, and error handling.
API gateway development
Deploy an API gateway with Kong or AWS API Gateway. Manage authentication, throttling, and routing for multiple microservices.
Internal API development
Design internal APIs for data exchange between legacy systems and new microservices. Use message queues like RabbitMQ or Kafka.
API security audit
Audit your existing APIs for vulnerabilities. Check for SQL injection, broken authentication, and rate limiting gaps. Deliver a remediation plan.
We build for every business type.
SaaS platforms
fintech
healthcare
ecommerce
logistics
Why you need an experienced custom API development vendor
A poorly designed API costs you time, money, and developer trust.
IRPR has shipped over 200 APIs for clients in 50 countries. We use OpenAPI 3.0 for documentation, Postman for testing, and Datadog for monitoring. Every API includes rate limiting, authentication (JWT or OAuth 2.0), and error handling with proper HTTP status codes.
Our APIs handle 10,000+ requests per second on average. We design for horizontal scaling from day one. You get a production-ready API with CI/CD pipelines, automated tests, and deployment scripts for AWS, GCP, or Azure.
Generic dev shop vs experienced custom API development vendor
Not all API development teams are equal. Here is what sets IRPR apart.
Generic shops often deliver APIs with no documentation, no tests, and no monitoring. You end up with a black box that breaks in production. IRPR delivers a fully documented, tested, and monitored API that your team can extend.
We use OpenAPI 3.0 for auto-generated docs, Jest and Pytest for unit tests, and Datadog for real-time monitoring. Every API includes a health check endpoint and structured logging.
- No OpenAPI documentation
- No automated tests
- No rate limiting
- No monitoring or alerts
- No CI/CD pipeline
- No security audit
- OpenAPI 3.0 docs auto-generated
- 100% test coverage with Jest/Pytest
- Rate limiting with Redis
- Datadog monitoring with alerts
- GitHub Actions CI/CD
- OWASP security audit
Our API development process
We follow a 4-phase process to deliver your API on time and on budget.
Phase 1 is the Roadmap. We define endpoints, data models, and authentication strategy. You get a fixed price and timeline. Phase 2 is development. We build the API with your chosen stack.
Phase 3 is testing and deployment. We run load tests, security scans, and deploy to staging. Phase 4 is release. We hand over source code, docs, and monitoring dashboards.
What ships with your API
Every API project includes these deliverables by default.
You get a production-ready API with full documentation, automated tests, and monitoring. No hidden costs. No surprises.
- Source code in your GitHub repo
- OpenAPI 3.0 documentation
- Postman collection for testing
- CI/CD pipeline on GitHub Actions
- Unit tests with Jest or Pytest
- Integration tests for all endpoints
- Rate limiting with Redis
- Authentication (JWT or OAuth 2.0)
- Datadog monitoring dashboard
- Deployment scripts for AWS/GCP/Azure
What we ship in this practice.
Payment processing API for a fintech startup
Built a REST API that processes 5,000 transactions per day. Integrated with Stripe and Plaid. Reduced payment failures by 40%. Tech stack: Node.js, PostgreSQL, Redis, Stripe API.
EHR integration API for a telehealth platform
Developed a HIPAA-compliant API that syncs patient records with Epic and Cerner. Handles 10,000 patient records daily. Tech stack: Python, FastAPI, FHIR, AWS HealthLake.
Product catalog API for an ecommerce brand
Created a GraphQL API that serves product data to a React Native mobile app. Reduced page load time by 60%. Tech stack: Apollo Server, MongoDB, Redis, Shopify API.
Inventory sync API for a logistics company
Built a gRPC API that syncs inventory across 5 warehouses in real time. Eliminated stockouts. Tech stack: Go, gRPC, Kafka, PostgreSQL.
CRM integration API for a SaaS platform
Developed a webhook-based API that pushes lead data to Salesforce and HubSpot. Reduced manual data entry by 8 hours per week. Tech stack: Node.js, Express, Salesforce API, RabbitMQ.
Analytics API for a media company
Built a REST API that aggregates user engagement data from 3 sources. Serves 1 million requests per day. Tech stack: Python, FastAPI, ClickHouse, Redis.
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.
8-12 week delivery
We ship production-ready APIs in 8-12 weeks. Our average is 10 weeks. You get a working API with tests, docs, and monitoring.
Senior engineers only
Every engineer on your project has 8+ years of experience. No juniors. No offshore teams. You work directly with the people building your API.
Full code ownership
You own all source code, documentation, and deployment scripts. No licensing fees. No vendor lock-in. You can take the code anywhere.
Compliance built in
We build HIPAA-compliant APIs for healthcare, PCI-DSS for fintech, and SOC 2 for SaaS. We handle audits and certifications.
99.9% uptime SLA
We design APIs for high availability with auto-scaling, load balancing, and failover. We monitor with Datadog and alert within 5 minutes of any issue.
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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