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Building Enterprise Integrations — Middleware, Queues, and ESBs

The integration architecture playbook: middleware, message queues, ESBs, and patterns for connecting enterprise systems at scale.

16 min readintegration, middleware, message-queues, esb, rabbitmq, enterprise-architecture

Zapier connects your form to your spreadsheet. That's fine for departmental workflows. But when you need to connect an ERP to a WMS to a CRM to an e-commerce platform — all processing thousands of transactions per hour, all requiring guaranteed delivery, all needing to handle failures gracefully — you need enterprise integration architecture.

This is the world of middleware, message queues, and enterprise service buses. These patterns have been solving integration problems for decades, and understanding them is essential for anyone building integrations that handle real business volume.

Why Point-to-Point Breaks Down

The simplest integration is point-to-point: System A calls System B's API directly. Need to connect two systems? Write one integration. Simple.

The problem is math. Wi

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