Leading API Integration Development ServicesIntegration Development
We build custom API integrations that connect your systems in 8-12 weeks. Fixed price, senior engineers, full code ownership.
IRPR builds leading API integration development services that connect your SaaS platform, ERP, CRM, or legacy system with third-party APIs using Node.js, Python, Go, and modern middleware like MuleSoft or Kong. We handle authentication, rate limiting, data mapping, and error handling so your data flows reliably.
Every engagement ships a fully documented, tested integration in 8-12 weeks. Pricing starts at $80,000 and goes to $250,000 depending on the number of endpoints and compliance requirements. We build to HIPAA, PCI-DSS, SOC 2, and FERPA standards.
CTOs hire us to unify data across 10+ tools without hiring a full integration team. Product managers hire us to launch a marketplace integration (Stripe, Salesforce, HubSpot) in 10 weeks. Compliance officers hire us to build audit-proof data pipelines for healthcare or fintech.
Types of software we ship.
REST API integration
Connect your app to any RESTful service with OAuth 2.0, JWT, or API key authentication. Handles pagination, retries, and idempotency.
GraphQL API integration
Unify multiple REST APIs behind a single GraphQL gateway. Reduces frontend calls by 60% and simplifies data fetching.
SOAP API integration
Integrate with legacy enterprise systems using SOAP/XML. We handle WSDL parsing, WS-Security, and complex transformations.
Event-driven API integration
Build real-time data pipelines using Kafka, RabbitMQ, or AWS EventBridge. Triggers actions on data changes across systems.
Ecommerce API integration
Connect Shopify, Magento, or custom carts to ERP, 3PL, and payment gateways. Synchronizes inventory, orders, and shipping.
Healthcare API integration
Integrate EHR systems like Epic or Cerner with lab, pharmacy, and billing APIs. Compliant with HIPAA and FHIR standards.
Financial API integration
Connect to Plaid, Stripe, QuickBooks, or Xero for payment processing, bank feeds, and accounting automation. PCI-DSS compliant.
CRM API integration
Sync data between Salesforce, HubSpot, Zoho, or custom CRM and your marketing, support, and billing tools. Bi-directional sync with conflict resolution.
We build for every business type.
Healthcare
Fintech
Ecommerce and retail
SaaS and enterprise
Logistics and manufacturing
Why leading API integration development services matter
A broken integration costs your business hours of manual work and lost revenue every week.
IRPR has shipped 200+ integrations across 50 countries. Our clients see 40% faster data sync, 60% fewer manual data entry errors, and 99.9% uptime on their integration pipelines. We build with retry logic, dead-letter queues, and monitoring dashboards in Datadog or New Relic.
We work with REST, GraphQL, SOAP, and webhook-based APIs. Every integration includes automated tests (Postman, Jest) and a runbook for incident response. Our fixed pricing means you know the cost before we write a single line of code.
How we differ from generic API shops
Most agencies hand you a black box integration you cannot maintain. IRPR gives you the source code, the tests, and the docs.
Generic dev shops bill hourly, change scope, and deliver undocumented spaghetti code. They use a single junior developer who leaves after 6 months. You end up with a fragile integration that breaks every time the third-party API updates.
IRPR assigns a team of 2-3 senior engineers who stay until your integration is stable. We write integration tests, unit tests, and a deployment runbook. You get full ownership of the code and the CI/CD pipeline. No black boxes.
- Hourly billing with no cap
- Junior developer who may leave mid-project
- No automated tests
- No monitoring or alerting
- No documentation or runbook
- Code stored in their repo, not yours
- Fixed price agreed in week 2
- Senior engineers (8+ years experience)
- Integration and unit tests in CI pipeline
- Datadog dashboard with alerts on failures
- Runbook with step-by-step recovery steps
- Full source code in your GitHub repo
Our API integration development process
We follow a 4-phase process that turns your requirements into a production-ready integration in 8-12 weeks.
Phase 1 is the Roadmap. In week 2 we deliver a fixed-price quote, a data flow diagram, and a list of every endpoint we will integrate. Phase 2 is the Build. Our engineers write integration code, handle authentication, and set up error handling.
Phase 3 is the Release. We deploy to staging, run load tests, and set up monitoring. Phase 4 is the Handoff. You get the source code, CI/CD pipeline, and a 30-day warranty period. After that we offer a maintenance retainer at $2,000/month.
What ships with every integration
Every integration includes these 8 deliverables by default. No extra charges.
We do not hand you a zip file and walk away. Every IRPR integration ships with a complete set of artifacts that your team can use to maintain and extend the integration for years.
You get the source code, infrastructure as code, automated tests, monitoring dashboards, and a runbook. Your team can onboard in 2 days, not 2 weeks.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- Integration tests for every endpoint
- Unit tests for error handling logic
- Data flow diagram (draw.io format)
- Deployment runbook with rollback steps
- Datadog dashboard with error alerts
- Postman collection for manual testing
What we ship in this practice.
Healthcare data exchange platform
Built a FHIR-based integration between Epic EHR and a lab ordering system. Reduced manual lab order entry by 8 hours per week. Tech stack: Node.js, HL7 FHIR, AWS HealthLake, Docker.
Fintech payment reconciliation
Connected a lending platform to Plaid, Stripe, and QuickBooks. Automated daily reconciliation of 5,000+ transactions. Reduced accounting team workload by 15 hours per week. Tech stack: Python, Plaid API, Stripe API, PostgreSQL.
Ecommerce inventory sync
Integrated Shopify with a 3PL warehouse management system. Real-time inventory sync across 3 warehouses. Cut out-of-stock incidents by 40%. Tech stack: Node.js, Shopify API, ShipStation API, Redis.
SaaS CRM to marketing automation
Built a bi-directional sync between HubSpot and Salesforce. Mapped 50+ custom fields with conflict resolution. Reduced data entry errors by 60%. Tech stack: Python, HubSpot API, Salesforce REST API, Celery.
Logistics tracking system
Integrated a fleet management platform with 4 carrier APIs (UPS, FedEx, DHL, USPS). Provided real-time tracking and automated label generation. Reduced manual tracking time by 12 hours per week. Tech stack: Go, carrier REST APIs, RabbitMQ, MongoDB.
EdTech gradebook integration
Connected a learning management system to a student information system (PowerSchool). Synced grades, attendance, and enrollment data daily. Compliant with FERPA. Tech stack: Node.js, PowerSchool API, GraphQL, AWS RDS.
Why teams hire us.
Fixed price, not hourly
Every integration 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 code.
Senior engineers only
Every engineer on your project has 8+ years of experience building integrations. No juniors, no offshore teams. You talk directly to the person writing your code.
Full code ownership
You own every line of code we write. It lives in your GitHub repo from day one. No proprietary frameworks, no license fees, no lock-in.
Compliance built in
We build integrations that pass HIPAA, PCI-DSS, SOC 2, and FERPA audits. Our engineers handle encryption at rest and in transit, audit logging, and access controls.
8-12 week delivery
Most integrations ship in 8 to 12 weeks. We use a proven template and automated tooling to avoid re-inventing the wheel. Faster than hiring an internal team.
Post-launch support included
Every integration comes with a 30-day warranty. We monitor for errors, fix bugs, and answer questions. After that we offer a $2,000/month retainer for ongoing maintenance.
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.