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Design a multi-tenant cloud IDE that runs untrusted user code in the browser.

Every AI product that runs generated code (notebooks, agents, code interpreters) ends up building this, and the interview turns on two numbers: how strong your isolation is and how fast a session starts. The answer is microVMs plus snapshot restore, and knowing why the VM boot is not the slow part.

Updated Aug 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.

Every AI product that runs generated code (notebooks, agents, code interpreters) ends up building this, and the interview turns on two numbers: how strong your isolation is and how fast a session starts. The answer is microVMs plus snapshot restore, and knowing why the VM boot is not the slow part.

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