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hardAnthropic

Design the Claude chat service

The reported Anthropic open-ended design, and the round where candidates get tested on GPU memory and KV-cache arithmetic mid-whiteboard. The serving spine, the memory math that explains every product limit, and the safety layer the rubric explicitly wants.

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

The reported Anthropic open-ended design, and the round where candidates get tested on GPU memory and KV-cache arithmetic mid-whiteboard. The serving spine, the memory math that explains every product limit, and the safety layer the rubric explicitly wants.

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Next in this trackDesign multi-region active-active for a stateful agent platform. Where does the state model bite you?Next in this trackDeploy into a customer's air-gapped, continuously-audited environment (FedRAMP/IL5-style). Design for the audit, not just the gap.Next in this trackHit a hard p99 SLA on an LLM product without blowing a fixed monthly spend ceiling. Model it.
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