Top Custom API Development CompanyAPI Development
We build secure, scalable APIs for web and mobile apps. Get a custom API in 8-12 weeks with fixed pricing.
IRPR builds custom APIs for web apps, mobile backends, and third-party integrations. We use Node.js, Python, Go, and .NET for REST and GraphQL APIs, with PostgreSQL, Redis, and Docker for deployment.
Every API project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance for HIPAA, PCI-DSS, and SOC 2. Source code and CI/CD pipeline are yours from day one.
Our clients include CTOs who need a scalable API for their SaaS product, engineering leads integrating legacy systems with modern microservices, and startup founders building an MVP with a custom API backend.
Types of software we ship.
REST API Development
Build stateless RESTful APIs with OpenAPI/Swagger documentation. Deploy on AWS API Gateway or Azure API Management. Includes rate limiting and authentication.
GraphQL API Development
Develop GraphQL APIs with Apollo Server or Relay. Schema-first design with real-time subscriptions. Integrate with React, Vue, or mobile clients.
Third-Party API Integration
Connect your system to Salesforce, Stripe, Twilio, or HubSpot. Handle OAuth, webhooks, and data sync with retry logic and error logging.
Microservices API Gateway
Design a gateway layer with Kong or Envoy. Route requests to microservices, enforce authentication, and aggregate responses. Includes service discovery.
Internal API Development
Build private APIs for internal tools, data pipelines, and legacy system wrappers. Use gRPC for high-performance inter-service communication.
API Security Audit and Hardening
Audit existing APIs for OWASP Top 10 vulnerabilities. Implement JWT, OAuth 2.0, API keys, and rate limiting. Generate compliance reports.
Real-Time API (WebSocket/SSE)
Build real-time APIs with WebSocket or Server-Sent Events. Use Socket.io or Pusher for live dashboards, chat, and notifications.
Data API and ETL Pipeline
Create APIs that expose data from databases, data lakes, or external sources. Use Apache Kafka, Airflow, or AWS Glue for streaming and batch processing.
We build for every business type.
SaaS and Platforms
Fintech and Payments
Healthcare and Life Sciences
Ecommerce and Retail
Enterprise and Internal Tools
Why IRPR is a top custom API development company
We have shipped over 200 custom APIs for clients in 50+ countries.
Each API is built with a dedicated team of senior engineers. We use Node.js, Python, Go, and .NET with PostgreSQL, Redis, and Docker. Deployments go to AWS, GCP, or Azure with CI/CD pipelines.
The difference between generic dev shops and a top API development company
Not all API development is the same. Here is how IRPR compares.
Generic dev shops often deliver undocumented, unsecured APIs that break in production. IRPR writes OpenAPI specs, enforces authentication, and sets up monitoring from day one.
- No API contract or documentation
- No security audit (OWASP Top 10)
- No CI/CD or automated testing
- No rate limiting or error handling
- No performance benchmarking
- No post-launch support
- OpenAPI/Swagger spec before coding
- JWT + OAuth 2.0 + API keys
- CI/CD with GitHub Actions + Sentry
- Rate limiting, retry logic, circuit breaker
- Load testing with k6 and Artillery
- 2 weeks free support after launch
How we build your custom API in 8-12 weeks
Our process is transparent and predictable.
We follow a 4-phase process: Idea, Roadmap, Product, Release. Each phase has clear deliverables and milestones.
What ships with every custom API project
You get more than just code.
Every API project includes these deliverables by default. No hidden costs.
- OpenAPI 3.0 specification
- Source code in your GitHub/GitLab repo
- CI/CD pipeline with GitHub Actions
- Postman collection for testing
- Docker Compose for local development
- Sentry error tracking
- Datadog or New Relic monitoring dashboard
- Rate limiting and throttling config
- Authentication (JWT/OAuth/API keys)
- Deployment guide and runbook
What we ship in this practice.
SaaS Subscription API
Built a REST API for a B2B SaaS platform handling 10,000+ concurrent users. Used Node.js, PostgreSQL, Redis, and Stripe integration. Reduced manual billing errors by 90%.
Healthcare FHIR API
Developed a HIPAA-compliant FHIR API for a telemedicine app. Used Python, FastAPI, and AWS HealthLake. Enabled real-time patient data exchange across 3 clinics.
Fintech Payment Gateway API
Created a PCI-DSS compliant payment API processing $5M monthly. Used Go, PostgreSQL, and Stripe Connect. Achieved 99.99% uptime with multi-region deployment.
Ecommerce Inventory API
Built a GraphQL API for a multi-channel retailer syncing inventory across Shopify, Amazon, and 3PL warehouses. Used Apollo Server, MongoDB, and AWS Lambda. Cut stockouts by 60%.
Real Estate MLS Integration API
Developed an API to aggregate MLS data from 12 sources into a single endpoint. Used .NET Core, SQL Server, and Azure Functions. Reduced data refresh time from 4 hours to 15 minutes.
EdTech LMS API
Built a FERPA-compliant API for a learning management system serving 50,000 students. Used Node.js, PostgreSQL, and Redis. Enabled real-time grade sync and attendance tracking.
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. Our average project is $80K-$250K.
Senior engineers only
We assign a team of 2-3 senior engineers with 10+ years experience. No junior devs, no offshore interns. Our team has built APIs for Fortune 500 companies.
Security and compliance built in
We implement OWASP Top 10, OAuth 2.0, and JWT by default. We have delivered HIPAA, PCI-DSS, and SOC 2 compliant APIs. Every API gets a security audit before launch.
Full ownership from day one
You own the source code, documentation, and CI/CD pipeline. No licensing fees, no vendor lock-in. We push code to your repository from sprint one.
Proven track record
We have shipped 200+ custom APIs for clients in 50+ countries. 98% of projects deliver on time. Our APIs handle millions of requests per day.
Post-launch support included
Every API project includes 2 weeks of free post-launch support. We monitor uptime, fix bugs, and provide performance tuning. Extended maintenance plans available.
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.