# Most System Design Mistakes Hide Between the Boxes

DevFeed: [Most System Design Mistakes Hide Between the Boxes](<https://devfeed.tech/articles/most-system-design-mistakes-hide-between-the-boxes-17958.md>)

Original publisher: [Read original article](<https://newsletter.systemdesignclassroom.com/p/most-system-design-mistakes-hide--between-the-boxes>)

Author: Raul Junco

Published: 2026-05-30T12:16:25Z

Content type: article

Language: en

Sources: [System Design Classroom](<https://devfeed.tech/sources/system-design-classroom.md>)

Topics: [event driven](<https://devfeed.tech/topics/event-driven.md>), [Databases](<https://devfeed.tech/topics/databases.md>), [API](<https://devfeed.tech/topics/api.md>), [cloud-infrastructure](<https://devfeed.tech/topics/cloud-infrastructure.md>), [dashboards](<https://devfeed.tech/topics/dashboards.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [cloud-infrastructure](<https://devfeed.tech/tags/cloud-infrastructure.md>), [dashboards](<https://devfeed.tech/tags/dashboards.md>), [databases](<https://devfeed.tech/tags/databases.md>), [event-driven](<https://devfeed.tech/tags/event-driven.md>), [logs](<https://devfeed.tech/tags/logs.md>)

## AI overview

The article examines system design failures that occur between services and components, such as events not being published after database commits, replica lag, overloaded queues, and schema changes affecting consumers. It emphasizes that interactions among databases, queues, caches, APIs, logs, dashboards, and cloud infrastructure create failure patterns that architecture diagrams may not reveal.

## Source excerpt

Five gaps your architecture diagrams don't show