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Interview questions from top companies, mapped to the exact round they show up in. Prep for what you will actually face.

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The Loop aggregates publicly shared interview experiences and curated commonly-asked questions, each labeled with its source. Not affiliated with any company listed.

CC BY-NC 4.0 · © 2026

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S

AI · San Francisco, CA

Sierra

AI customer agents. Applied LLM systems and pragmatic full-stack.

5 interviews shared — read how each round went.

5 of 5 shown

Role
Level
Full-stackNew Grad / JuniorOutcome unknown

New Grad / Junior · Full-stack

5-round junior fullstack process. Pragmatic questions — more real-world than pure puzzles.

5 rounds · 11 questions · 2025→
FrontendMidOffer

Mid · Frontend

A mid frontend loop. Balanced across coding, design, and collaboration.

5 rounds · 11 questions · 2023→
Full-stackMidOutcome unknown

Mid · Full-stack

5-round mid fullstack process. Balanced across coding, design, and collaboration.

5 rounds · 11 questions · 2023→
BackendSeniorOffer

Senior · Backend

A senior backend loop. Fast-paced; expect follow-ups that push on depth.

6 rounds · 13 questions · 2025→
BackendStaff+Offer

Staff+ · Backend

5-round staff backend process. Fundamentals mattered as much as getting to an answer.

5 rounds · 9 questions · 2024→

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