Best API Integration Development DevelopersIntegration Developers
We build custom API integrations that connect your tools in days, not months. Senior engineers, fixed pricing, and code you own.
IRPR builds custom API integrations that connect your SaaS tools, legacy systems, and third-party platforms. We use REST, GraphQL, gRPC, and webhooks to move data reliably between apps with error handling and logging built in.
Every integration project ships with source code in your repo, a CI/CD pipeline (GitHub Actions), Sentry error monitoring, and Postman documentation. Timeline is 8-12 weeks, pricing starts at $80K and goes to $250K for complex multi-endpoint systems. We comply with HIPAA, PCI-DSS, and SOC 2.
CTOs needing to unify a data stack, product managers integrating Salesforce with a homegrown CRM, and founders connecting payment gateways and shipping APIs all hire IRPR. We also work with healthcare IT teams linking EHRs and fintech teams aggregating bank APIs.
Types of software we ship.
Custom API Connector
A one-to-one bridge between two systems, with field mapping, retry logic, and error queues. Built on Node.js or Python.
Enterprise Service Bus (ESB)
Centralized message routing for 5+ endpoints with transformation, queuing, and monitoring via RabbitMQ or Kafka.
API Gateway
Single entry point for microservices with rate limiting, authentication, and logging using Kong or AWS API Gateway.
Data Sync Platform
Bidirectional data synchronization between CRM, ERP, and marketing tools with conflict resolution. Uses PostgreSQL and Redis.
Webhook Aggregator
Collect, normalize, and re-route webhooks from Stripe, Shopify, HubSpot, and others to a single endpoint.
Real-Time Data Pipeline
Streaming integrations for live inventory, order status, or IoT sensor data using Kafka Streams or AWS Kinesis.
Multi-Platform Integration Hub
Connect three or more systems (e.g., Salesforce, QuickBooks, Mailchimp) with a unified dashboard and error logs.
Legacy System Adapter
Expose a REST or GraphQL wrapper around SOAP, FTP, or flat-file legacy systems. Maintains backward compatibility.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
What You Get with IRPR API Integration Development
Every integration project includes measurable outcomes, not just code.
We track uptime, error rates, and sync latency for every endpoint. After three months, our integrations average 99.9% uptime and less than 0.1% error rate on retried failures.
Clients see reduced manual data entry by 10-20 hours per week and fewer reconciliation errors. One fintech client cut their payment reconciliation time from 8 hours to 15 minutes with a custom API connector built by IRPR.
How IRPR Compares to Generic Dev Shops
Most agencies talk big but deliver late with unpredictable costs. IRPR does the opposite.
Generic dev shops often promise custom API integrations but hand off hidden monthly fees, incomplete documentation, and code that breaks when endpoints change. They use junior engineers and hourly billing that spirals.
IRPR assigns senior engineers only, gives a fixed price at Roadmap (week 2), and ships everything you need to run and maintain the integration yourself. Your code never touches shared servers.
- Hourly billing with no ceiling
- Junior developers on your project
- Black-box code you can't see or modify
- No error monitoring or alerting built in
- Vague timelines that slip 2-4 weeks
- You pay extra for documentation and handover
- Fixed price from Roadmap week 2
- Senior engineers with 8+ years experience
- Full source code in your GitHub repo
- Sentry error tracking and health checks included
- 8-12 week delivery tracked in public roadmap
- Documentation, Postman collections, and one-hour handoff call included
Our API Integration Development Process
Four phases, each with clear deliverables and approval gates.
We start with a two-week Discovery sprint to map your systems, define endpoints, and agree on success metrics. Then we architect the integration stack and begin coding.
Testing runs in parallel with development. We deploy to staging first, verify data flow, and only then push to production. The whole process takes 8-12 weeks for most integrations.
Every API Integration Ships With
There are no hidden extras. Everything below is included in the fixed price.
We believe in full transparency. When we hand over the project, you have everything to run the integration yourself or hand it to your team.
All code is written to production standards with error handling, logging, and monitoring baked in. No one outside IRPR touches your infrastructure.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Sentry error tracking and performance monitoring
- Postman collection for every endpoint
- Architecture diagram and data flow documentation
- Runbook with deployment and rollback steps
- One-hour handover walkthrough with your team
- 3 months of post-launch support (bug fixes, minor changes)
- Compliance documentation for HIPAA, PCI-DSS, or SOC 2 (if applicable)
- Load testing report showing throughput and latency
What we ship in this practice.
Unified Ecommerce Integration Hub
IRPR built a single integration that syncs orders from Shopify, WooCommerce, and Magento into a legacy ERP. The client reduced manual data entry by 15 hours per week and cut order errors by 80%. Tech stack: Node.js, PostgreSQL, RabbitMQ, Stripe API.
Real-Time Patient Data Bridge
A telehealth platform needed to sync patient records between Epic EHR and a custom scheduling app. IRPR built a HL7 FHIR connector with HL7v2 fallback. The integration processes 10,000 messages per day with 99.95% uptime. Tech stack: Python, FHIR, PostgreSQL, AWS Lambda.
Multi-Bank Payment Aggregator
A fintech startup needed to collect transactions from 5 bank APIs (Plaid, Yodlee, Finicity) and normalize them into one format. IRPR built a connector that handles rate limiting and token refresh automatically. The client launched in 10 weeks instead of 6 months. Tech stack: Node.js, Redis, Plaid API, AWS ECS.
CRM-Marketing Automation Sync
A B2B SaaS company needed bidirectional sync between Salesforce and HubSpot. IRPR built a connector that deduplicates records and logs every sync event. It reduced duplicate contacts by 95% and saved the marketing team 10 hours per week. Tech stack: Python, Salesforce REST API, HubSpot API, PostgreSQL.
Logistics Route Optimization Connector
A freight broker needed to integrate with 20 carrier APIs for real-time quotes and tracking. IRPR built a rate-shopping engine that caches responses and retries on failures. The client saw a 40% increase in successful automated quotes. Tech stack: Node.js, Redis, Carrier APIs (JSON/XML), AWS SQS.
Hotel Booking Channel Manager
A travel tech company needed to connect their PMS to Booking.com, Expedia, and Airbnb. IRPR built a two-way sync for availability and reservations with conflict resolution. The client reduced overbookings by 100% and improved nightly sync speed by 5x. Tech stack: Java, Spring Boot, PostgreSQL, Kafka.
Why teams hire us.
Fixed price, not hourly
Every API integration project gets a fixed quote during the Roadmap phase (week 2). You never see a surprise invoice for scope creep or extra debugging. Budgets stay predictable.
Senior-only engineering teams
Every developer on your project has 8+ years of experience and has shipped at least 10 production integrations. We don't use junior developers or outsource parts of the work.
8-12 week delivery guaranteed
Our process is designed to ship integrations in 8-12 weeks, even for complex multi-endpoint projects. We show a public roadmap so you know exactly where we stand each week.
Full code ownership from day one
You own every line of code we write. It goes directly into your GitHub repository. No proprietary frameworks, no licensing fees, no lock-in.
Built-in error handling and monitoring
Every integration logs every request, retries on failure with exponential backoff, and sends alerts to Sentry if something goes wrong. Your team gets a dashboard with error rates and latency.
Post-launch support included
After we ship, we provide 3 months of support for bug fixes, endpoint changes, and small enhancements. You have a direct line to the engineers who built the integration.
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.