Experienced Custom API Development CompanyAPI Development
We build custom APIs that connect your systems and scale to millions of requests. Fixed price delivery in 8-12 weeks.
IRPR is an experienced custom API development company. We build REST APIs with Node.js and Python, GraphQL APIs with Apollo, and event-driven APIs with Kafka. Every API is designed for high throughput and low latency.
A typical API project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle authentication (OAuth 2.0, JWT), rate limiting, documentation (Swagger/OpenAPI), and monitoring (Datadog, Sentry). Compliance for healthcare (HIPAA), fintech (PCI-DSS), and SaaS (SOC 2) is built in.
Our buyers are CTOs at SaaS companies who need a unified API for their platform, fintech founders integrating payment gateways, healthcare IT directors connecting EHR systems to third-party apps, and ecommerce operations managers syncing inventory across multiple marketplaces.
Types of software we ship.
REST API Development
Stateless APIs using Express.js or FastAPI. Handles thousands of concurrent requests with proper caching and pagination.
GraphQL API Development
Flexible queries with Apollo Server and Prisma. Reduces over-fetching and speeds up frontend development.
Third-Party API Integration
Connect your app to Stripe, Salesforce, HubSpot, or Shopify. We handle webhooks, rate limits, and error retries.
Microservices API Gateway
Centralized gateway using Kong or NGINX. Routes requests, enforces auth, and aggregates responses from multiple services.
Real-Time API with WebSockets
Low-latency bi-directional communication using Socket.io or WebSocket. Used for live dashboards and chat apps.
File Upload and Processing API
Handles large file uploads with multipart support. Processes images (Sharp), videos (FFmpeg), and PDFs (PDFKit).
Data Synchronization API
Sync data between CRM, ERP, and ecommerce platforms. Uses delta queries and event-driven triggers via RabbitMQ.
Machine Learning API Endpoint
Serve ML models (TensorFlow, PyTorch) behind a REST API. Handles inference requests with autoscaling on Kubernetes.
We build for every business type.
SaaS platforms
Fintech and banking
Healthcare
Ecommerce and retail
Logistics and supply chain
Why you need an experienced custom API development company
A poorly designed API costs you time, money, and developer trust.
IRPR has built over 200 APIs for clients in 50 countries. Each API is designed with versioning (v1, v2), proper error codes (HTTP 4xx/5xx), and rate limiting (1000 req/min per user). We use OpenAPI 3.0 for documentation so your team can start integrating within hours.
Our APIs handle 10,000 requests per second on average. We load test every endpoint with k6 before deployment. Uptime is 99.9% guaranteed with multi-region failover on AWS or GCP. If your API goes down, you lose revenue. We prevent that.
The difference between IRPR and a generic dev shop
Most agencies deliver APIs that break under load and have no documentation.
We see it all the time. A client hires a cheap shop, gets a REST API with no auth, no rate limiting, and no tests. Then they come to IRPR to rebuild it from scratch. That costs double.
IRPR builds production-ready APIs from day one. Every endpoint has unit tests (Jest), integration tests (Supertest), and a Postman collection. We deploy on Kubernetes with auto-scaling and set up Datadog monitoring. You get a working API that you can ship to customers immediately.
- No authentication or authorization
- No API documentation
- No rate limiting or throttling
- No monitoring or alerting
- No load testing before launch
- No versioning strategy
- OAuth 2.0, JWT, and API keys from day one
- OpenAPI 3.0 docs auto-generated
- Rate limiting with Redis and token bucket algorithm
- Datadog dashboards and PagerDuty alerts
- k6 load tests at 10K req/s before launch
- API versioning (/v1/, /v2/) with deprecation policy
Our API development process in 4 phases
We follow a structured process to deliver your API on time and on budget.
Every API project starts with the Roadmap phase. In week 2, we deliver a detailed document with endpoints, data models, auth strategy, and a fixed price. No surprises.
Then we build. You see progress every week in a private Slack channel. We deploy to staging after week 4. Final release happens after week 8-12, with full documentation and a runbook.
What ships with every API project
Every API comes with a complete delivery package.
When IRPR delivers your API, you get everything you need to run it independently. Source code is in your GitHub repo. Documentation is live on SwaggerHub. Monitoring is configured in Datadog.
You also get a runbook that explains how to deploy, scale, and debug the API. Your team can take over immediately.
- Source code in your GitHub or GitLab repo
- OpenAPI 3.0 documentation on SwaggerHub
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions with automated tests
- Docker container for local development
- Kubernetes deployment manifests
- Datadog dashboards and alert rules
- Load test results (k6) showing 10K req/s performance
- Runbook with deploy, scale, and debug instructions
- 30 days of post-launch support and bug fixes
What we ship in this practice.
Unified API for a SaaS analytics platform
A B2B SaaS company needed one API to serve web, mobile, and partner integrations. IRPR built a GraphQL API with Apollo Server and Prisma. The API handles 5000 requests per second and reduced frontend development time by 40%. Tech stack: Node.js, Apollo, PostgreSQL, Redis, AWS ECS.
HIPAA-compliant API for a telemedicine app
A healthcare startup needed an API to exchange patient data with EHR systems. IRPR built a REST API with FHIR standards and HIPAA-compliant encryption. The API processes 10,000 patient records daily with 99.9% uptime. Tech stack: Python, FastAPI, PostgreSQL, AWS KMS, Sentry.
Payment gateway API for a fintech platform
A fintech company needed to integrate with 5 payment processors (Stripe, Square, PayPal, Braintree, Adyen). IRPR built a unified payment API with PCI-DSS compliance and idempotency keys. The API processes $2M in transactions monthly. Tech stack: Node.js, Express, Stripe SDK, Redis, Datadog.
Inventory sync API for an ecommerce brand
A direct-to-consumer brand needed to sync inventory across Shopify, Amazon, and their warehouse system. IRPR built a REST API with webhooks and delta sync. The API reduced manual data entry by 8 hours per week and eliminated overselling. Tech stack: Node.js, Express, Shopify API, Amazon MWS, RabbitMQ.
Real-time tracking API for a logistics company
A logistics provider needed to track 10,000 shipments in real time for their customers. IRPR built a WebSocket API with Socket.io and Redis pub/sub. The API streams location updates every 5 seconds with 99.9% uptime. Tech stack: Node.js, Socket.io, Redis, MongoDB, AWS EC2.
Data aggregation API for a real estate platform
A real estate startup needed to aggregate listing data from 50 MLS sources into one API. IRPR built a REST API with ETL pipelines using Apache Airflow. The API serves 1 million property records with sub-200ms response times. Tech stack: Python, FastAPI, PostgreSQL, Airflow, Elasticsearch.
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. The price you see is the price you pay.
Senior engineers only
Every IRPR engineer has 7+ years of experience. We do not outsource to juniors. Your API is built by a senior backend engineer who has shipped production APIs for companies like Stripe and Shopify.
Production-ready from day one
We do not build prototypes. Every API we ship has auth, rate limiting, monitoring, and documentation. You can deploy to production immediately without rework.
Compliance built in
We build APIs that pass HIPAA, PCI-DSS, and SOC 2 audits. Encryption at rest (AES-256) and in transit (TLS 1.3) is standard. Logging is configured for audit trails.
You own the code
After the project, you own 100% of the source code, documentation, and deployment scripts. There is no lock-in, no licensing fees, no recurring payments to IRPR.
We deliver in 8-12 weeks
Our process is optimized for speed. The average API project ships in 10 weeks. We have a 98% on-time delivery rate across 200+ products.
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.