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Meta Full Stack Engineer Interview Guide

How to prepare for a Full Stack Engineer interview at Meta: the interview process, what this role is evaluated on, and sample questions with tips.

Updated 2026-09

The Full Stack Engineer role at Meta

Meta end-to-end feature ownership. This guide combines Meta's interview process with the specific expectations for a Full Stack Engineer, so you can prepare for both the company bar and the role bar at once.

How to prepare for a Full Stack Engineer interview: frontend + backend breadth, system design across the stack, and the trade-offs interviewers probe.

Interview process at Meta

Initial screen: 1-2 coding problems in a shared editor.
Onsite: 2 'Ninja' coding rounds, 1 system design ('System Design' or 'Product Design'), and 1 behavioral ('Jedi').
Each round is 45 minutes; coding rounds often have two problems.

What Meta looks for

Coding speed and correctness — produce working, optimal code quickly.
Scale thinking — design for billions of users in the system design round.
Builder mindset — bias toward shipping and measuring.
Behavioral: impact, collaboration, and handling ambiguity.

What a Full Stack Engineer is evaluated on

End-to-end feature design — schema, API, and UI together.
Knowing where the hard parts live (validation, security, state).
Pragmatism — choosing the right depth at each layer.
Ability to debug across the stack.

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