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Design a multi-region, highly available LLM serving platform with failover and bounded cost.

GPUs are scarce and expensive, so multi-region HA for LLMs is not just web-app HA with bigger boxes. Capacity, routing, and failover all bend around the GPU constraint. Here is the design.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

GPUs are scarce and expensive, so multi-region HA for LLMs is not just web-app HA with bigger boxes. Capacity, routing, and failover all bend around the GPU constraint. Here is the design.

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UP NEXT ON YOUR JOURNEY

Next in this trackDesign a system to run LLM inference over a billion documents offline, as cheaply as possible.Next in this trackDesign an internal evaluation platform that lets teams measure and compare LLM features reliably.Next in this trackDesign a prompt management platform so teams can version, test, and deploy prompts without redeploying code.

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