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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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Fintech · Oakland, CA

Block

Square and Cash App. Payments coding and pragmatic system design.

5 interviews shared — read how each round went.

5 of 5 shown

Role
Level
BackendNew Grad / JuniorOutcome unknown

New Grad / Junior · Backend

A junior backend loop. Balanced across coding, design, and collaboration.

5 rounds · 11 questions · 2025→
Full-stackNew Grad / JuniorWithdrew

New Grad / Junior · Full-stack

A junior fullstack loop. Pragmatic questions — more real-world than pure puzzles.

5 rounds · 11 questions · 2024→
FrontendMidOutcome unknown

Mid · Frontend

A mid frontend loop. Fast-paced; expect follow-ups that push on depth.

5 rounds · 11 questions · 2024→
Full-stackMidRejected

Mid · Full-stack

Mid fullstack interview. Balanced across coding, design, and collaboration.

5 rounds · 11 questions · 2025→
BackendSeniorOutcome unknown

Senior · Backend

A senior backend loop. Balanced across coding, design, and collaboration.

6 rounds · 13 questions · 2023→

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