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Company Interview: Design ChatGPT-Like Memory for a Product (EXPLAINED)

Company BasedGPTHard22 min read

**Storage** Vector + structured facts table keyed by user_id; version memories on conflict.

TL;DR — Quick Answer

Separate episodic (session) vs long-term memory stores with user-visible CRUD, consent opt-in, PII scrubbing, retrieval injection into system prompt, memory-specific evals, and delete/export for GDPR.

The Interview Question

Design a memory system like ChatGPT memory for your SaaS assistant: storage, privacy, editing, and evals.

Deep Explanation

Storage Vector + structured facts table keyed by user_id; version memories on conflict.

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