Senior API Integration Development StudioSenior API
We build custom API integrations that connect your systems. Senior engineers only, fixed price, 8-12 week delivery.
IRPR builds custom API integration platforms using REST, GraphQL, SOAP, gRPC, and event-driven architectures. Our senior engineers design secure, low-latency connections between your existing systems and third-party services like Stripe, Salesforce, or Epic EHR.
Every project ships as a production-ready MVP in 8-12 weeks with a fixed price starting at $80,000. We handle compliance for HIPAA, PCI-DSS, and SOC 2 out of the box, including audit logs, encryption, and access controls.
We work with CTOs modernizing legacy system integrations, Product Managers adding third-party API connectors (Stripe, HubSpot, Twilio), Data Engineers building ETL pipelines, and Founders launching MVPs that require multiple API integrations from day one.
Types of software we ship.
Custom API Gateway
Centralize authentication, rate limiting, and routing for all internal APIs. Built with Kong or Tyk on Kubernetes.
Real-Time Data Sync Platform
Keep CRM, ERP, and inventory databases in sync with Change Data Capture (CDC) using Debezium and Kafka.
Payment Gateway Integration
Connect Stripe, Braintree, or Adyen with your billing system. Includes PCI-DSS compliance and idempotency keys.
CRM Integration Hub
Sync leads, contacts, and deals between Salesforce, HubSpot, and custom apps via OAuth 2.0 and webhooks.
ETL Pipeline for Analytics
Extract, transform, load data from multiple APIs into Snowflake or BigQuery using dbt and Airflow.
SaaS Connector Platform
Build a Zapier-like integration marketplace for your SaaS product. Embeddable with Express and Stripe Connect.
Authentication & SSO Bridge
Unify Okta, Auth0, or Azure AD with your app via OIDC/SAML. Includes role-based access and MFA.
Legacy System API Wrapper
Wrap COBOL, mainframe, or proprietary SOAP APIs in clean REST/GraphQL endpoints. Use Node.js or Go.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics & Travel
Why Senior Engineers Matter for API Integration
We assign senior engineers with 10+ years of experience to every project. No juniors, no subcontractors.
Junior developers often miss edge cases in API error handling, idempotency, and rate limiting. Our senior team has built over 200 API integrations across healthcare, fintech, and ecommerce. We handle timeout strategies, circuit breakers, and retry logic by default.
Every API integration project includes a dedicated DevOps engineer who sets up monitoring (Datadog), logging (ELK), and alerting (PagerDuty). Your system stays online with 99.9% uptime SLAs built into every contract.
Senior API Integration vs Generic Dev Shops
Not all API development teams are equal. See how IRPR stands apart from low-cost agencies.
Generic dev shops often hand your API integration to a junior developer with little oversight. They charge hourly and push scope creep. You end up with fragile connectors that break when a third-party API updates.
IRPR assigns a senior backend engineer and a DevOps specialist to every engagement. We use code-first design, automated integration tests, and versioned API contracts. Your integration ships on time, on budget, and with full documentation.
- Junior developers building integrations
- Hourly billing with no fixed scope
- No compliance expertise (HIPAA, PCI)
- Manual testing, fragile connectors
- No monitoring or alerting setup
- Code ownership unclear after project
- Senior engineers with 10+ years experience
- Fixed price from the Roadmap phase (week 2)
- Built-in HIPAA, PCI, SOC 2 compliance
- Automated integration tests with continuous deployment
- Datadog monitoring and PagerDuty alerts included
- Full source code ownership with no licensing
Our API Integration Process
We follow a four-phase framework: Idea, Roadmap, Product, Release. Every API integration project follows the same proven process.
In the Idea phase, we map your data flows, identify all endpoints, and document error handling requirements. This takes one week. By the end, you have a clear specification of every API call and data transformation needed.
The Roadmap phase produces a fixed-price contract and a 12-week timeline. We commit to delivery dates and weekly demos. During Product we build the integration with staging environments and automated tests. Release includes production deployment, monitoring, and a 30-day warranty.
What Ships with Your API Integration
Every project delivers a production-ready integration with all the tools you need to maintain and extend it.
We do not just hand you a zip file of code. You get a fully documented, deployable system with monitoring, logging, and error tracking. Your team can take over immediately or we can provide ongoing support.
- Source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions or GitLab CI
- Dockerized services ready for Kubernetes or ECS
- Datadog dashboards for API latency and error rates
- Structured logs shipped to ELK or Datadog Logs
- Sentry error tracking for every endpoint
- API contract (OpenAPI 3.0 or GraphQL Schema)
- Postman collection for manual testing
- Deployment runbook for your DevOps team
- 30-day warranty for bug fixes and support
What we ship in this practice.
EHR Integration for Telehealth Platform
Connected a telehealth app with Epic EHR using FHIR APIs. Reduced patient data sync from 2 hours to 5 minutes. Tech stack: Next.js, Node.js, FHIR, AWS Lambda, PostgreSQL.
Payment Gateway Aggregator for SaaS
Built a unified payment API bridging Stripe, Braintree, and Adyen. Saved the client 40 engineering hours per month on multi-gateway reconciliation. Tech stack: Go, Stripe Connect, PostgreSQL, Redis.
Multi-Vendor Order Sync for Marketplace
Created a real-time order sync between Shopify, Magento, and a custom warehouse API. Eliminated manual order entry, saving 20 hours per week. Tech stack: Node.js, Kafka, MongoDB, AWS ECS.
CRM-to-Salesforce Data Pipeline
Built an ETL pipeline that syncs leads and deals from HubSpot to Salesforce daily. Reduced data inconsistency errors by 90%. Tech stack: Python, dbt, Snowflake, Airflow.
Real-Time Tracking API for Logistics
Integrated UPS and FedEx tracking APIs into a warehouse management system. Provided real-time delivery ETAs, reducing customer support tickets by 35%. Tech stack: Node.js, Redis, GraphQL, AWS AppSync.
Booking Engine API for Travel Platform
Connected to Amadeus GDS API for flight and hotel search, booking, and cancellation. Launched in 10 weeks with 99.9% uptime. Tech stack: Go, PostgreSQL, RabbitMQ, Kubernetes.
Why teams hire us.
Senior Engineers Only
Every developer on your project has 10+ years of experience. No juniors, no outsourcing. Our team has built over 200 API integrations across 50+ countries.
Fixed Price, Not Hourly
We provide a fixed quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. The price you see is the price you pay.
Compliance Built In
We include HIPAA, PCI-DSS, and SOC 2 compliance steps automatically. Audit logs, encryption at rest and in transit, and role-based access control are standard in every build.
98% On-Time Delivery
We ship on time because we use a fixed-scope roadmap and weekly demos. Out of 200+ projects, 98% delivered within the original timeline.
Full Code Ownership
You own all source code, infrastructure scripts, and documentation. No licensing fees, no lock-in. Your team can take over operations on day one.
Async-First with US Overlap
Our engineers work async across time zones but guarantee 4 hours of real-time overlap with US-based teams in Eastern, Central, Mountain, and Pacific time zones.
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.