Your product embeds inside a customer's app. Design auth: SSO, SAML/OIDC, and row-level security.

Enterprise deals die in this design review. The answer has three layers most candidates blur together: who you are, what you can see, and how an embedded product proves both, plus the permission-staleness trap that fails Glean loops.

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

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Next in this trackYour demo runs on a laptop. Now deploy it in the customer's VPC with no internet egress. What breaks?Premium Next in this trackRun a schema migration on a customer's live production database, zero downtime. Walk me through it.Premium Next in this trackA customer wants to self-host open-weights models instead of paying API fees. Model the real costs and make a recommendation.Premium

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Your product embeds inside a customer's app. Design auth: SSO, SAML/OIDC, and row-level security.

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