Senior Custom API Development DevelopersAPI Development
We build custom APIs for your product. 200+ APIs shipped in 12 weeks or less.
IRPR hires only senior custom API development developers. We build REST APIs, GraphQL endpoints, and gRPC services using Node.js, Python, Go, and Java. Every API ships with OpenAPI docs, Postman collections, and automated test coverage above 90%.
Each project starts at $80K and delivers in 8 to 12 weeks. We handle compliance for HIPAA, PCI-DSS, SOC 2, and GDPR. Our team ships the full stack: API gateway, rate limiting, auth, logging, monitoring, and CI/CD pipelines.
You are a CTO scaling your SaaS platform and need a production-grade API. You are a product manager at a healthcare startup that needs a HIPAA-compliant patient data API. You are a founder building a fintech app that requires PCI-DSS compliant payment APIs. You are an engineering director migrating from monolith to microservices.
Types of software we ship.
REST API Development
Build resource-oriented REST APIs with versioning, pagination, and OAuth 2.0. We use Express.js, FastAPI, or Spring Boot.
GraphQL API Development
Develop GraphQL APIs with Apollo Server or Hasura. Single endpoint, typed schema, and real-time subscriptions.
Microservices API Development
Design event-driven microservices with message brokers like RabbitMQ or Kafka. Each service has its own database and API.
Third-Party API Integration
Connect your product to Stripe, Salesforce, HubSpot, Twilio, or any external API. We handle auth, retries, and error mapping.
Internal API Development
Build internal APIs for your team to access shared data and services. Includes API documentation and usage dashboards.
API Gateway & Management
Deploy API gateways using Kong or AWS API Gateway. Add rate limiting, caching, authentication, and request transformation.
Real-Time API Development
Create real-time APIs with WebSockets or Server-Sent Events. Used for live dashboards, chat, and notifications.
Data API Development
Build APIs that expose database queries, ETL pipelines, or analytics results. Supports PostgreSQL, MongoDB, and BigQuery.
We build for every business type.
SaaS & Enterprise
Healthcare & Life Sciences
Fintech & Payments
Ecommerce & Retail
Media & Content
Why Hire Senior Custom API Development Developers from IRPR
Our senior developers have shipped over 200 APIs for clients in 50 countries.
Every developer at IRPR has at least 8 years of experience building production APIs. They have worked with AWS Lambda, API Gateway, Kong, and Nginx. They know how to handle rate limiting, authentication (OAuth 2.0, JWT), and error handling patterns.
We use a fixed-price model. After a 2-week Roadmap phase, you get a fixed quote and a delivery date. No hourly billing, no scope creep. 98% of our projects ship on time.
How IRPR Compares to Generic Development Shops
Not all API development teams are equal. Here is the difference.
Generic dev shops assign junior developers to your project. They use hourly billing and change requirements without notice. They rarely write tests or documentation.
IRPR assigns only senior developers. We write automated tests, generate OpenAPI docs, and deploy with CI/CD. You get full code ownership and a fixed price.
- junior or mid-level developers
- hourly billing with no cap
- no API documentation
- no automated tests
- no CI/CD pipeline
- unclear code ownership
- senior developers only (8+ years)
- fixed price after Roadmap phase
- OpenAPI docs and Postman collections
- 90%+ test coverage
- CI/CD on GitHub Actions or GitLab
- you own all source code
Our API Development Process: From Idea to Production
We follow a 4-phase process that eliminates surprises.
Every project starts with a 2-week Roadmap phase. We define endpoints, data models, auth flows, and compliance requirements. You get a fixed price and timeline before we write a single line of code.
After the Roadmap, we build the API in 8 to 12 weeks. We deploy to staging, run load tests, and generate documentation. Then we release to production with monitoring and error tracking.
What Ships with Every Custom API Project
Every API project includes these deliverables by default.
You get the full source code, CI/CD pipeline, API documentation, and monitoring. No hidden fees or surprise charges.
All code is yours. We do not use templates or boilerplate generators. Every API is custom-built for your use case.
- Source code in your GitHub or GitLab repo
- CI/CD pipeline on GitHub Actions or GitLab CI
- OpenAPI 3.0 documentation
- Postman collection with example requests
- Automated test suite (unit + integration)
- API monitoring with Datadog or Sentry
- Authentication (OAuth 2.0, JWT, or API keys)
- Rate limiting and throttling configuration
- Error handling and logging (structured logs)
- Deployment scripts for AWS, GCP, or Azure
What we ship in this practice.
Patient Data API for Telemedicine Platform
Built a HIPAA-compliant REST API for a telemedicine startup. The API handles patient records, appointment scheduling, and video session tokens. Reduced manual data entry by 8 hours per week. Tech stack: Node.js, PostgreSQL, Twilio Video, AWS Lambda.
Payment Processing API for Fintech App
Developed a PCI-DSS compliant payment API that processes credit card transactions and ACH transfers. The API handles 10,000 requests per minute with 99.9% uptime. Tech stack: Python, FastAPI, Stripe, AWS RDS.
Order Management API for Ecommerce Brand
Created a REST API that syncs orders between Shopify and a custom warehouse management system. Reduced order processing time by 40%. Tech stack: Node.js, Express, Shopify API, PostgreSQL.
User Management API for SaaS Platform
Built a GraphQL API for user authentication, role management, and billing integration. The API supports 50,000 active users. Tech stack: Apollo Server, MongoDB, Stripe, Auth0.
Property Listing API for Real Estate Platform
Developed a REST API that integrates with MLS databases and serves property listings to a mobile app. Reduced listing update time from 24 hours to 5 minutes. Tech stack: Python, FastAPI, PostgreSQL, Redis.
Content Delivery API for Media Streaming
Built a real-time API that delivers personalized video recommendations and streaming URLs. The API handles 1 million requests per day. Tech stack: Go, gRPC, AWS CloudFront, DynamoDB.
Why teams hire us.
Senior Developers Only
Every developer at IRPR has 8+ years of experience building production APIs. No juniors. No mid-level. You get a senior engineer who has shipped APIs for healthcare, fintech, and ecommerce clients.
Fixed Price, Not Hourly
We give you a fixed price after the 2-week Roadmap phase. No hourly billing. No surprise invoices. You know the cost before we start building.
12-Week Delivery Guarantee
Most API projects ship in 8 to 12 weeks. We have a 98% on-time delivery rate. If we are late, we tell you early and adjust the scope.
Full Code Ownership
You own all source code, documentation, and deployment scripts. No proprietary frameworks. No lock-in. You can take the code to any team.
Compliance Built In
We build APIs that comply with HIPAA, PCI-DSS, SOC 2, and GDPR. We handle encryption, audit logging, and access controls. No afterthoughts.
Production-Ready from Day One
Every API ships with CI/CD, monitoring, error tracking, and documentation. You get a production-grade API that your team can maintain and scale.
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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