Senior API Integration Development FirmIntegration Development
Hire a senior-only team to build your API integrations. Fixed price, 8-12 week delivery, full ownership.
IRPR builds custom API integrations for SaaS, marketplaces, and enterprise platforms. We connect CRMs, ERPs, payment gateways (Stripe, Braintree), and data services using Node.js, Python, Golang, and event-driven architectures.
Every integration ships in 8-12 weeks with a fixed price. Typical MVP costs $80K-$250K. Code is yours, deployed to cloud (AWS/GCP/Azure) with CI/CD and monitoring.
We work with CTOs building multi-tenant platforms, product managers needing third-party data syncs, and founders launching marketplaces that require payment, shipping, and inventory integration.
Types of software we ship.
Custom API Gateway Development
Build a unified gateway routing requests to microservices with Kong API Gateway, rate limiting, authentication, and logging.
ERP Integration Platform
Connect NetSuite, SAP, or Dynamics 365 with custom connectors that sync inventory, orders, and financials in real time.
Payment Gateway Connector
Integrate Stripe, Braintree, Square, or Adyen with idempotent endpoints, webhook handling, and PCI-DSS compliance.
CRM Data Sync Engine
Sync leads, contacts, and deals between Salesforce, HubSpot, and internal databases using Delta-based replication.
Ecommerce API Middleware
Bridge Shopify, Magento, or WooCommerce with fulfillment services and ERPs using REST and GraphQL APIs.
Real-time Webhook Aggregator
Build a single endpoint that normalizes webhooks from multiple providers, deduplicates, and retries failed deliveries.
Third-Party OAuth Service
Implement OAuth 2.0 flows for Google, Microsoft, and Slack with secure token storage and refresh logic.
Event-driven Data Pipeline
Use Kafka or RabbitMQ to process high-volume events between services with guaranteed delivery and error handling.
We build for every business type.
SaaS
Ecommerce
Fintech
Healthcare
Marketplace
Why You Need a Senior API Integration Development Firm
Integration projects fail when done by junior developers or agencies without deep API experience.
A single misconfigured endpoint can cause data loss, security breaches, or hours of manual fixes. Senior engineers understand retry logic, idempotency, rate limiting, and error handling from day one.
IRPR has shipped over 200 API integrations across 50 countries. Every project includes production logging, monitoring, and a rollback plan. We don't hand off code - we hand off a running system.
Generic Agency vs IRPR
Most agencies treat API integration as an afterthought, leading to brittle and unmaintainable connectors.
Generic dev shops rely on junior talent and hourly billing. They often skip logging, documentation, and monitoring. The result: integrations that break silently and cost more over time.
IRPR builds every integration with production readiness in mind. You get a senior engineer who writes code for reliability, observability, and scale - not just to check a box.
- Junior or mid-level engineers only
- Hourly billing, scope creep
- Inconsistent code quality
- No monitoring setup
- Delayed timelines
- Code not owned by you
- All senior engineers with 15+ years
- Fixed price, no surprises
- Code review and CI/CD pipelines
- Sentry, Datadog, PagerDuty out of the box
- 8-12 week delivery guarantee
- Full source code and IP ownership
Our 4-Phase API Integration Process
We build your integration in four predictable phases so nothing is left to chance.
Every project follows Idea, Roadmap, Product, Release. This structure eliminates guesswork and ensures your integration meets real business needs within budget.
What Ships With Every Integration
You get a production-ready integration, not a prototype. Here's what we deliver by default.
No half-finished code. Every project ships with the tooling needed to run confidently in production.
- Source code in your private repo
- CI/CD pipeline (GitHub Actions)
- Error tracking with Sentry
- Application monitoring (Datadog or New Relic)
- OAuth setup and token management
- Webhook handling and retry logic
- API documentation (OpenAPI/Swagger)
- Load testing report
- Deployment runbook
- Architecture diagram
What we ship in this practice.
Payment Gateway Integration for Fintech Startup
Connected Stripe and Wise for cross-border payments. Reduced failed transactions by 25%. Tech stack: Python, Celery, Postgres.
Shopify-ERP Sync for Retail Chain
Built a middleware that syncs orders and inventory between Shopify and NetSuite in real time. Cut manual data entry by 12 hours per week. Tech stack: Node.js, RabbitMQ, TypeScript.
HIPAA-Compliant EHR Data Exchange
Federated patient data across 3 EHR systems using FHIR APIs. Met HIPAA audit requirements. Tech stack: Golang, Kafka, Azure FHIR.
Unified Webhook Aggregator for SaaS Platform
Aggregated webhooks from Slack, GitHub, and Jira into a single endpoint with deduplication. Eliminated duplicate alert noise by 80%. Tech stack: TypeScript, Redis, AWS Lambda.
Real-Time Shipment Tracking Integration
Integrated FedEx and UPS tracking APIs into a logistics dashboard with WebSocket push. Increased customer satisfaction score by 15%. Tech stack: Go, WebSocket, Postgres.
OAuth Single Sign-On for Media Platform
Implemented OAuth 2.0 flows for Google, Facebook, and Apple sign-in. Reduced login abandonment by 30%. Tech stack: Node.js, Passport.js, MongoDB.
Why teams hire us.
Fixed Price, Not Hourly
Every integration has a fixed quote from the Roadmap phase. No hourly billing, no invoices that balloon. You know the cost before we start.
Senior Engineers Only (15+ Years)
Every engineer on your project has 15+ years of experience. No junior staff, no offshore handoffs. You talk directly with the person writing the code.
Full Code Ownership
All source code, documentation, and IP belong to you. We never charge royalties or license fees. You can run, modify, or deploy anywhere.
Built for Production (Monitoring Out of Box)
We ship Datadog dashboards and Sentry error tracking with every integration. You know about issues before your customers do.
8-12 Week Delivery Guarantee
Most integrations are production-ready in 8-12 weeks. We meet the timeline or we adjust the scope transparently - no surprises.
Domain-Expert Teams (HIPAA, PCI-DSS, SOC 2)
Our teams have built integrations for healthcare (HIPAA), fintech (PCI-DSS), and enterprise (SOC 2). Compliance is built in, not bolted on.
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.