Expert API Integration Development DevelopersIntegration Development
We build custom API connections between your systems. Get a fixed price and a working MVP in 12 weeks.
IRPR builds custom API integrations that connect your CRM, ERP, payment gateways, and other SaaS tools. We use Node.js, Python, Go, and serverless functions on AWS Lambda to create durable, secure data flows between systems.
Every project starts with a 2-week Roadmap phase for a fixed fee. After that, we ship a working MVP in 8 to 12 weeks. Pricing ranges from $80K to $250K depending on the number of endpoints, data volume, and compliance requirements. We deliver under HIPAA, PCI-DSS, SOC 2, and GDPR standards.
Our expert API integration development developers work with CTOs scaling their platform, VP of Engineering needing to unify data across acquisitions, startup founders automating workflows, and healthcare IT directors connecting EHRs to analytics tools.
Types of software we ship.
CRM-to-ERP integration
Sync customers, orders, and inventory between Salesforce, HubSpot, and NetSuite. Real-time via webhooks and batch via cron jobs.
Payment gateway connector
Connect Stripe, Braintree, or Adyen to your accounting system. Handle refunds, subscriptions, and chargebacks through one API.
EHR data exchange pipeline
Build HIPAA-compliant FHIR endpoints to share patient records between Epic, Cerner, and your analytics platform. Audit logs included.
Multi-warehouse inventory sync
Aggregate stock levels from Shopify, Magento, and warehouse WMS into one view. Update every 5 minutes with idempotent retries.
SSO identity provider bridge
Implement SAML 2.0, OAuth 2.0, or OpenID Connect to let users log in via Okta, Azure AD, or Google Workspace.
Customer data platform (CDP) integration
Unify user profiles from Mailchimp, Segment, and Intercom into a single Snowflake or BigQuery database. Deduplication built in.
Legacy system API wrapper
Expose modern REST/GraphQL endpoints around old mainframe or AS/400 systems. Translate data without touching core logic.
Marketplace feed aggregation
Collect listings and orders from Amazon, eBay, and Etsy into one dashboard. Handle rate limits and API version changes automatically.
We build for every business type.
eCommerce and retail
healthcare and life sciences
financial services
SaaS and technology
logistics and manufacturing
Why expert API integration development developers matter
A custom API connector can replace weeks of manual data entry and eliminate spreadsheet errors.
IRPR has shipped over 200 products across 50 countries. Our expert API integration development developers use statically typed languages like TypeScript and Go to reduce runtime errors. Every endpoint gets automated tests, retry logic, and circuit breakers.
We integrate with dozens of third-party APIs including Salesforce, HubSpot, Stripe, QuickBooks, Xero, Shopify, Magento, BigCommerce, and AWS S3. Each integration is built within a monorepo so your whole system stays in sync.
The difference between generic dev shops and IRPR
Most agencies overcharge for API work and deliver brittle code. IRPR ships production-grade connectors on time and on budget.
Generic shops often rewrite the same integration multiple times because they skip the design phase. They bill hourly, miss deadlines, and leave you with undocumented endpoints. IRPR starts with a fixed-price Roadmap where we map every data field, error case, and security requirement before writing code.
We use API gateways (Kong or AWS API Gateway) with rate limiting, caching, and monitoring from day one. Every connector includes a dashboard so you can see sync status, error logs, and latency metrics in real time.
- Hourly billing with no price ceiling
- No compliance documentation for HIPAA or PCI
- Hardcoded API keys in the codebase
- No automated tests beyond smoke tests
- No error handling for upstream API failures
- No post-delivery monitoring or support
- Fixed price from the Roadmap phase (week 2)
- HIPAA, PCI, SOC 2 compliant by design
- Secrets managed via AWS Secrets Manager or Vault
- Integration tests running in CI/CD (GitHub Actions)
- Retry with exponential backoff and circuit breakers
- Built-in monitoring with Datadog or Sentry alerts
How we deliver your API integration
Our process ensures you get a working connector that handles real-world data volumes and edge cases.
Phase 1: Roadmap – we audit your existing systems, map data models, and write a detailed specification. You get a fixed price and a 6-week delivery timeline. Phase 2: Build – we spin up a dedicated team of 2 to 4 senior engineers who write the integration in parallel using a monorepo with shared types and tests.
Phase 3: Deploy & Monitor – we set up CI/CD pipelines, deploy to your AWS or Azure account, and configure dashboards and alerts. Phase 4: Handoff – we transfer full ownership of the code, docs, and runbooks to your team. We also offer 30 days of post-launch support.
What ships with every API integration
Every project includes production-ready infrastructure and full documentation.
You get source code in your private GitHub repo, a CI/CD pipeline, automated tests, and a monitoring dashboard. We also provide API documentation in OpenAPI 3.0 format and a runbook for on-call teams.
- Source code in your GitHub repository
- CI/CD pipeline on GitHub Actions or CircleCI
- Automated unit, integration, and load tests
- OpenAPI 3.0 specification for every endpoint
- Error handling with retry logic and dead-letter queues
- Logging and monitoring via Datadog or Sentry
- Secret management with HashiCorp Vault or AWS Secrets Manager
- Runbook for incident response
- Deployment to your own cloud account (AWS, Azure, GCP)
- 30 days of post-launch support
What we ship in this practice.
Healthcare ETL pipeline
Built a HIPAA-compliant FHIR pipeline that extracts 50K patient records per night from Epic and loads them into a Snowflake analytics warehouse. Reduced manual data entry by 15 hours per week. Stack: Python, Flask, AWS Lambda, Snowflake.
Multi-carrier shipping integration
Integrated ShipStation with FedEx, UPS, and DHL APIs for a 3PL warehouse. Handles 200K shipment requests per month with 99.99% success rate. Stack: Node.js, RabbitMQ, PostgreSQL, Stripe for billing.
SaaS-to-SaaS CRM sync
Connected HubSpot, Salesforce, and a custom in-house CRM so that contact updates propagate in both directions within 30 seconds. Eliminated duplicate data entry for a 200-person sales team. Stack: TypeScript, Apollo GraphQL, Kafka, Postgres.
Real-time inventory sync for eCommerce
Built a connector between Magento 2 and a legacy ERP running on SQL Server. Stock levels update every 5 minutes. Reduced overselling by 99%. Stack: C# .NET Core, Azure Service Bus, SQL Server.
Payment gateway reconciliation
Created a bridge from Stripe and Braintree to QuickBooks Online. Automatically matches payments to invoices and flags discrepancies. Saves 10 hours per week for an accounting team of 5. Stack: Python, FastAPI, PostgreSQL, QuickBooks API.
IoT data pipeline for manufacturing
Collected sensor data from PLCs using OPC UA and pushed to an AWS IoT Core pipeline. Integrated with Siemens MES for real-time dashboards. 50K messages per second with less than 1% loss. Stack: Go, AWS IoT Core, Kinesis, S3.
Why teams hire us.
Fixed price, not hourly
Every integration project gets a fixed quote after the Roadmap phase. No hourly billing, no surprise invoices, no scope creep charges. You know the total cost before we write the first line of code.
Senior engineers only
We don't outsource or hire juniors. Every engineer on your project has 8+ years of experience with API design, distributed systems, and security. We assign 2 to 4 engineers per project.
Compliance built in
We handle HIPAA, PCI-DSS, SOC 2, and GDPR requirements from the start. Our code includes audit logging, encryption at rest and in transit, and access controls. No afterthought security patches.
We own the full delivery timeline
From Roadmap to production release takes 8-12 weeks for most integrations. We've shipped over 200 products on time with 98% on-time delivery. If we see a risk, we tell you in the first week.
Full code ownership
You own every line of code. We deliver the source, tests, and documentation in your repository. No license fees, no vendor lock-in. You can modify the integration with your own team later.
Post-launch monitoring included
We set up Datadog or Sentry dashboards for your integration and provide 30 days of support. We also offer ongoing maintenance contracts at a fixed monthly rate if you need continued development.
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.