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The New Three-Tier Application


How to manage the complexity of distributed backend architectures - exploring different ways of orchestrating services and ensuring durable execution

Even monolithic backends now face similar challenges, as they increasingly depend on numerous third-party services (e.g. OpenAI for AI capabilities, Stripe for billing, Twilio for messaging, Auth0 for authentication) and must carefully coordinate interactions with them. Here, developers implement orchestration themselves, often leveraging an event processing system or message broker like Apache Kafka, AWS SQS, or RabbitMQ. The service simply looks up each workflow's state in Postgres and resumes each from where it left off, ensuring customer orders are processed correctly even through multiple system failures.

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Tier Application