System Design Classroom
Raul JuncoA System Design Newsletter to help you build better software.
| Platform |  | Pricing | Only free issues | Publishes | Weekly |
|---|---|---|---|---|---|
| Issues | 66 | Founded | 2 years ago | Last Issue | 16 days ago |
| Active | |||||
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newsletter.systemdesignclassroom.co...Latest Issues
Bad Retries Can Break Good Systems
A user places an order for the last item in stock.
Your API works. Your database works. Your deployment is fine.
But the call to the inventory service takes three seconds too long.
The request times out.
From the Order API’s point of vi...
Event-Driven Systems Are Easy to Build but Hard to Keep Correct
The biggest lie event-driven systems tell is that working infrastructure means a working system.
It does not.
The broker is healthy.
Consumers are online.
Messages are flowing.
Dashboards are green.
And yet, somehow, the business i...
Consistency is negotiable. But the bill always lands somewhere.
In distributed systems, consistency is not something you maximize by default. It is something you buy.
The stronger the guarantee, the more you usually pay in latency, coordination, availability, or operational complexity.
That is why t...
Good System Design Starts With Constraints, Not Diagrams, Not Tools
Many engineers study system design from the wrong end.
They start with Kubernetes. Then microservices. Then queues. Then service meshes. Then they memorize diagrams full of boxes, arrows, and cloud logos.
But when a real system gets slow,...
Async systems scale your system… and your problems.
The failure no one expects
An IoT system publishes two events from the same device into a queue:
-
“door open”
-
“lock door”
They land on a shared topic and get picked up by different consumers running in parallel.
Each event...
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Authors
The writers behind this newsletter.
I simplify software engineering. Sharing lessons to help early-career developers grow as Software Engineers. I write about Systems Design, Algorithms, Good Practices, and Machine Learning.
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