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Design an AI email assistant that drafts replies, summarizes threads, and prioritizes the inbox.

Summarize, draft, triage, all over the most sensitive PII a person owns. The signal is grounding in the actual thread, matching the user's voice, and a hard human-in-the-loop rule on anything that gets sent.

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

Summarize, draft, triage, all over the most sensitive PII a person owns. The signal is grounding in the actual thread, matching the user's voice, and a hard human-in-the-loop rule on anything that gets sent.

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UP NEXT ON YOUR JOURNEY
Next in this trackDesign a text-to-image generation service (Midjourney/DALL-E-like) at scale.Next in this trackDesign an AI resume-screening system that handles 100K applications per week.Next in this trackDesign a real-time transcription system for thousands of concurrent audio streams.
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