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A worker finishes a thumbnail, but the same job comes back. Design the message queue behind that behavior, from durable ...

A checkout API can save an order and still leave the customer staring at a loading spinner. In this video, I explain how to decide ...

🚀 **How YouTube Uploads Work Behind the Scenes | Message Queue in System Design** Ever wondered how YouTube handles millions ...

Part 4 of a beginner-friendly system design series. The SMS provider goes down at dinner time: what happens to orders?

How do you design a notification system when providers slow down, workers crash, and retries can send the same message twice ...

In system design interviews, it's never the first question that rejects you. It's the follow-up. You tell the interviewer: "I will just split it ...

Design a content delivery network for global software downloads. Would you delay a new download to protect the source? Follow ...

Apache Airflow is written in Python, yet a task can be a TypeScript function, a Go binary or a Java program. How? Airflow never ...

How do you design an AI application that can scale to 1 million users? In this AI system design walkthrough, we build a ...