Professional API Integration Development ServicesAPI Integration
We build custom API integrations that move your data where it needs to go. Get a fixed price quote in your second week.
IRPR builds professional API integration development services that connect your software to third-party platforms like Salesforce, Stripe, HubSpot, and Twilio. We use Node.js, Python, and Go to create fast, secure API middleware.
Every integration ships with a fixed price (starting at $80K) and a timeline of 8 to 12 weeks. You get real-time error logs, retry logic, and rate limit handling. Our builds comply with HIPAA, PCI-DSS, and SOC 2.
Companies hire us when their in-house team is too busy, their offshore vendor keeps missing deadlines, or they need a HIPAA-compliant integration for a healthcare client. Typical buyers are CTOs, product owners, and agency owners who need reliable API work done right the first time.
Types of software we ship.
REST API Integration
Build RESTful endpoints that sync data between your app and third-party services like Salesforce, Shopify, or QuickBooks via JSON over HTTPS.
SOAP API Integration
Connect legacy enterprise systems like SAP, Oracle, or Microsoft Dynamics using SOAP protocols with XML payloads and WSDL definitions.
GraphQL API Development
Create a single GraphQL endpoint that queries multiple data sources (PostgreSQL, MongoDB, Redis) with exact field selection for mobile apps.
Payment API Integration
Integrate Stripe, Braintree, or Adyen for payment processing. Handle webhooks, refunds, subscriptions, and PCI-DSS compliance in 10 weeks.
CRM API Integration
Sync contacts, deals, and activities between your app and Salesforce, HubSpot, or Zoho using OAuth 2.0 and bulk API endpoints.
Ecommerce API Integration
Connect Shopify, WooCommerce, or BigCommerce to your ERP or 3PL system. Sync inventory, orders, and shipping statuses in real time.
Healthcare API Integration
Build HL7 FHIR or HIPAA-compliant APIs that connect EHR systems like Epic or Cerner to your telemedicine or analytics platform.
Middleware API Gateway
Deploy an API gateway using Kong or AWS API Gateway to rate-limit, authenticate, and route traffic across microservices and third-party APIs.
We build for every business type.
Healthcare providers
Financial services
Ecommerce and retail
SaaS and technology
Logistics and supply chain
Professional API Integration Development Services by the Numbers
Our track record shows what professional API integration development services can deliver.
IRPR has completed over 200 product launches that relied on third-party API integrations. We maintain a 98% on-time delivery rate across all projects. Our clients span 50+ countries, from early-stage startups to Fortune 500 enterprises in New York, Los Angeles, and beyond.
Each integration is built with automated monitoring and error recovery. Our production APIs average 99.9% uptime. We use tools like Datadog, Sentry, and PagerDuty to detect and resolve issues before they affect your users.
How Professional API Integration Development Services Differ from Generic Development
Most development shops build one-off API calls. We build systems that last.
A generic developer writes a single endpoint to pull data from a third-party API. They test it manually, push it to production, and move on. When the third-party API changes its schema or rate limits your requests, your integration breaks and your team scrambles to fix it.
IRPR treats API integration as a product. We design for error handling, retry logic, rate limiting, and monitoring from day one. Our integrations include automated tests for every endpoint plus a runbook for the operations team. You get a system that works predictably even when the upstream API changes.
- No error handling for 500 responses from the third-party API
- No retry logic when a webhook fails delivery
- No rate limit tracking; your integration gets throttled without warning
- No automated tests; every change is a manual test cycle
- No documentation; the integration is a black box
- No production monitoring; you discover outages from user complaints
- Automatic retry with exponential backoff for every failed API call
- Built-in rate limit handlers that queue requests and avoid throttling
- Comprehensive automated test coverage for all endpoints and edge cases
- Full integration documentation including sequence diagrams and data flow
- Real-time monitoring with Datadog dashboards and Sentry error alerts
- Dedicated project manager and senior engineer reachable in your time zone
Our Process for Professional API Integration Development Services
We follow a four-phase process that keeps your integration on time and on budget.
Every project begins with a discovery call where we map your data sources, endpoints, and business rules. By the end of week 2, you get a fixed price quote, a detailed technical design document, and a timeline. No scope creep, no surprises.
The build phase runs in two-week sprints. You see a working integration after the first sprint. We deploy to production in week 8 to 12, depending on complexity. After launch, we provide 30 days of production support to handle any edge cases.
What Ships with Every Professional API Integration Build
Every integration includes these deliverables by default.
You get more than just working code. Every project ships with a production-ready deployment pipeline, monitoring tools, and documentation that your team can use for years. No hidden costs, no surprise handoff fees.
Our clients tell us the documentation and monitoring setup alone save them weeks of onboarding time when new developers join their team. Everything is designed to be maintained by any competent engineer, not just the person who built it.
- Source code in your private GitHub or GitLab repository
- CI/CD pipeline using GitHub Actions or GitLab CI
- Automated unit tests covering all API endpoints
- Integration tests running against a sandbox environment
- Error tracking with Sentry and alerts for failed requests
- Production monitoring dashboards in Datadog or New Relic
- Architecture diagram showing data flow between systems
- Runbook with step-by-step incident response procedures
- API documentation (OpenAPI/Swagger spec) for every endpoint
- 30 days of post-launch production support
What we ship in this practice.
Stripe Payment Integration for a Fintech Platform
We replaced a custom billing system with a Stripe Connect integration. The integration handles subscriptions, invoicing, and automatic tax calculation. Processing time dropped from 12 hours to 4 minutes per batch. Built with Node.js, PostgreSQL, and Stripe API.
Salesforce CRM Sync for a B2B SaaS Company
We built a bidirectional sync between Salesforce and a custom analytics platform. Contacts, accounts, and opportunities update in real time via REST API and Platform Events. Reduced manual data entry by 15 hours per week. Built on Python, Celery, and Salesforce Bulk API.
Shopify Order Integration for a 3PL Warehouse
We connected Shopify orders to a warehouse management system using GraphQL and webhooks. Inventory levels update every 5 minutes, order statuses sync automatically, and returns trigger restock workflows. Fulfillment accuracy rose from 94% to 99.7%. Built with Ruby on Rails, Sidekiq, and Shopify API.
Epic EHR Integration for a Telemedicine App
We integrated a telemedicine platform with Epic using HL7 FHIR APIs. Patient demographics, appointment schedules, and clinical notes sync in real time. Compliance with HIPAA required end-to-end encryption and audit logging. Built with Go, FHIR R4, and AWS PrivateLink.
Twilio SMS Integration for a Real Estate Platform
We added SMS notifications to a real estate CRM using Twilio's API. Agents receive automatic alerts for new leads, showing requests, and price changes. Message delivery rate is 99.8% with 2-second average latency. Built with Node.js, Redis, and Twilio Messaging API.
QuickBooks Online Integration for an Accounting Startup
We built a sync between a bookkeeping app and QuickBooks Online via OAuth 2.0. Transactions, invoices, and vendor accounts reconcile daily. Customers can close their books 60% faster than manual entry. Built with PHP, Laravel, and QuickBooks Online API.
Why teams hire us.
Senior engineers only, no juniors
Every IRPR engineer has 10+ years of experience building production API integrations. We do not staff projects with junior developers or offshore teams. You work directly with the same senior engineer from design through deployment.
Fixed price from week 2
After the Roadmap phase (week 1-2), you get a fixed price quote covering the entire integration. No hourly billing, no surprise fees for scope changes, no budget overruns. The price you agree to in week 2 is the price you pay at launch.
8 to 12 week delivery
Most single-API integrations ship in 8 weeks. Complex multi-API projects take up to 12 weeks. You see working endpoints after the first sprint (2 weeks). We maintain a 98% on-time delivery rate across all projects.
Full compliance ready
We build integrations that meet HIPAA, PCI-DSS, and SOC 2 requirements. We use encrypted transport (TLS 1.3), tokenized authentication (OAuth 2.0, JWT), and audit logging for every request. Your compliance team gets the paperwork they need.
You own the code, always
All source code, test files, and documentation belong to you from day one. We deploy to your infrastructure, not ours. There are no licensing fees, no royalties, no recurring payments for the software we build.
Production monitoring included
Every integration ships with Datadog dashboards, Sentry error tracking, and PagerDuty alerting. You see request volumes, error rates, and latency in real time. Post-launch support covers 30 days of production monitoring and incident response.
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.