Expert Custom API Development ServicesAPI Development
We build secure, scalable APIs that connect your systems and data. Get a fixed price quote in week 2 and ship in 8-12 weeks.
IRPR builds expert custom API development services for companies that need to connect internal tools, expose data to partners, or power mobile and web apps. We use Node.js, Python, Go, and Java with frameworks like Express, FastAPI, and Spring Boot to deliver REST, GraphQL, and gRPC APIs.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle authentication (OAuth 2.0, JWT), rate limiting, caching (Redis), and compliance (HIPAA, PCI-DSS, SOC 2). You get full source code ownership and a CI/CD pipeline on GitHub Actions.
CTOs hire us to replace legacy point-to-point integrations. Product managers hire us to build API-first platforms for their SaaS. Engineering leads hire us to create internal APIs that reduce data silos across Salesforce, HubSpot, and custom databases.
Types of software we ship.
REST API Development
Build stateless RESTful APIs with JSON payloads, versioning, and pagination. Uses Express.js or FastAPI with PostgreSQL.
GraphQL API Development
Create flexible GraphQL APIs with Apollo Server or Hasura. Clients query exactly what they need, reducing over-fetching.
gRPC API Development
High-performance gRPC APIs using Protocol Buffers for microservices communication. Ideal for internal service-to-service calls.
Third-Party API Integration
Connect your app to Stripe, Salesforce, HubSpot, Twilio, or any REST/SOAP API. Includes error handling and retry logic.
API Gateway Development
Build a single entry point for multiple microservices with Kong or AWS API Gateway. Handles auth, rate limiting, and logging.
Webhook System Development
Create event-driven webhook systems that push data to external services in real time. Uses Redis queues and idempotency keys.
Internal API Development
Design internal APIs for data exchange between CRM, ERP, and custom databases. Uses RabbitMQ or Kafka for async messaging.
Public API Platform Development
Launch a developer-facing API with documentation (Swagger/OpenAPI), API keys, usage analytics, and a developer portal.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
Why Expert Custom API Development Services Matter
A well-designed API is the backbone of modern software, enabling data flow between systems and powering user experiences.
IRPR has shipped over 200 products across 50 countries, and every one of them relies on APIs. We build APIs that handle millions of requests per day with 99.9% uptime. Our APIs use Redis caching, PostgreSQL indexing, and horizontal scaling with Kubernetes to stay fast under load.
We also enforce security from day one. Every API includes OAuth 2.0 or JWT authentication, rate limiting, input validation, and encrypted data in transit (TLS 1.3). For regulated industries, we add HIPAA audit logs, PCI-DSS tokenization, and SOC 2 access controls.
How IRPR Delivers Expert Custom API Development Services
Most agencies overpromise and underdeliver. IRPR gives you a fixed price, a clear timeline, and full code ownership.
Generic dev shops start coding without a plan. They use hourly billing, change scope mid-project, and hand over undocumented code. You end up with a fragile API that breaks when traffic spikes.
IRPR starts with a Roadmap phase (week 2) where we define endpoints, data models, auth flows, and error handling. You get a fixed price and a 8-12 week timeline. We ship with OpenAPI docs, Postman collections, and a CI/CD pipeline.
- Hourly billing with no cap
- No API contract before coding
- No automated tests for endpoints
- No rate limiting or caching
- No documentation or Postman collection
- No CI/CD pipeline for deployment
- Fixed price from week 2
- OpenAPI contract before any code
- Automated integration tests with Jest
- Redis caching and rate limiting built in
- OpenAPI docs and Postman collection shipped
- CI/CD pipeline on GitHub Actions
Our Process for Expert Custom API Development Services
We follow a four-phase process that turns your idea into a production-ready API in 8-12 weeks.
Every project starts with a discovery call where we map your data sources, user roles, and integration points. We then move to the Roadmap phase where we define every endpoint, data model, and auth flow.
The Product phase is where we build the API with automated tests, rate limiting, and monitoring. The Release phase includes deployment to AWS or GCP, load testing, and a 30-day warranty.
What Ships with Every Expert Custom API Development Project
You get more than just code. Every project includes documentation, infrastructure, and monitoring out of the box.
We ship everything you need to run, maintain, and scale your API. No hidden dependencies, no missing pieces. Your team can take over on day one.
- Source code in your GitHub repo
- OpenAPI 3.0 specification
- Postman collection with example requests
- CI/CD pipeline on GitHub Actions
- Dockerized API with docker-compose
- Sentry error tracking
- Datadog or CloudWatch monitoring dashboard
- Load test results from k6
- Rate limiting with Redis
- Authentication with OAuth 2.0 or JWT
What we ship in this practice.
Patient Data API for a Telehealth Platform
Built a HIPAA-compliant REST API that syncs patient records between EHR systems and a custom telehealth app. Reduced manual data entry by 8 hours per week. Tech stack: FastAPI, PostgreSQL, Redis, AWS ECS.
Payment Processing API for a Fintech Startup
Developed a PCI-DSS compliant API that handles payment authorization, capture, and refunds via Stripe Connect. Processed $2M in transactions in the first month. Tech stack: Node.js, Express, Stripe API, PostgreSQL.
Product Catalog API for an Ecommerce Brand
Created a GraphQL API that serves product data to a React storefront and a mobile app. Reduced page load time by 40% with Redis caching. Tech stack: Apollo Server, MongoDB, Redis, AWS Lambda.
Subscription Management API for a SaaS Platform
Built a REST API that handles user signup, plan changes, and invoicing via Stripe Billing. Reduced churn by 15% with automated dunning emails. Tech stack: Ruby on Rails, Stripe API, PostgreSQL, Sidekiq.
Real-Time Tracking API for a Logistics Company
Developed a WebSocket API that streams GPS location data from delivery drivers to a customer-facing dashboard. Improved on-time delivery rate by 12%. Tech stack: Node.js, Socket.io, Redis, MongoDB.
Content Delivery API for a Media Platform
Created a REST API that serves video metadata, subtitles, and streaming URLs to a React Native app. Handled 10M requests per day with 99.9% uptime. Tech stack: Go, PostgreSQL, Redis, CloudFront.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost before we write a line of code.
8-12 week delivery
We ship production-ready APIs in 8-12 weeks. Our average project delivers in 10 weeks. You get a working API with automated tests, documentation, and monitoring.
Full code ownership
You own every line of code we write. No licensing fees, no lock-in, no recurring royalties. The source code, Docker images, and CI/CD pipeline are all yours.
Compliance built in
We build HIPAA, PCI-DSS, and SOC 2 compliant APIs from day one. Audit logs, encryption, access controls, and tokenization are part of the standard build.
Senior engineers only
Every project is staffed with senior engineers who have 8+ years of experience. No junior developers, no offshore teams, no handoffs. You talk directly to the people building your API.
30-day warranty
After launch, we provide 30 days of warranty support. We fix any bugs, answer questions, and help your team take over. No extra charges.
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.