Meta Software Engineer Interview Questions

Meta Software Engineer interview questions focus heavily on algorithmic problem solving, clean coding, and systems thinking, with senior roles adding larger-scale system design and product-sense prompts. What’s distinctive about interviewing at Meta is the emphasis on writing correct, readable code under time pressure while narrating trade-offs, plus a structured hiring committee and team-matching stage that evaluates consistency of feedback across interviewers. Candidates should expect a recruiter screen, one or two timed coding screens in a shared editor, and an onsite loop with coding, behavioral, and — for higher levels — system or product design. Meta has also piloted AI-enabled coding environments for some interviews, reflecting real-world tooling trends. Effective interview preparation combines sustained practice on medium-to-hard algorithm problems, timed mock interviews in the same editor format, and a clear system-design framework for scoping and scaling solutions. Equally important is preparing concise STAR stories that show impact, ownership, and collaboration. During interviews, communicate assumptions, ask clarifying questions, handle edge cases, and iteratively optimize code while explaining complexity and trade-offs.

352 Questions 1 Company07.06.2026
Showing 20 results
Role
Meta logo
Meta
Medium
Software Engineer

Design ticketing system with seat hold

Design an online ticketing system (similar to Ticketmaster) that allows users to browse events, select seats, and place a temporary 5-minute hold on s...

System Design
4
0
58 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Software Engineer

Validate complete binary tree

You are given the root of a binary tree. A complete binary tree is defined as a binary tree in which: 1. Every level, except possibly the last, is com...

Coding & Algorithms
1
0
23 people solved
Dec 8, 2025
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Meta
Medium
Software Engineer

Prepare answers for core behavioral questions

Behavioral Questions Set You are preparing for a behavioral interview. Be ready to answer the following questions clearly and concretely, ideally usin...

Behavioral & Leadership
3
0
32 people solved
Dec 7, 2025
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Meta
Easy
Software Engineer

Implement list cloning and k-frequency finder

You are given two separate coding tasks. --- Problem 1: Deep copy a linked list with extra pointers You are given the head of a singly linked list. Ea...

Coding & Algorithms
3
0
72 people solved
Nov 27, 2025
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Meta
Medium
Software Engineer Locked

Design an online chess game with undo and leaderboard

This question evaluates proficiency in real-time system design, state management, and concurrency control for multiplayer games, including consistency...

System Design
8
0
62 people solved
Nov 22, 2025
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Meta
Medium
Software EngineerIntern

Solve tree diameter and grid path problems

You are interviewing for a software engineer / ML intern role and are given the following algorithmic problems. --- Question 1: Longest Path in a Tree...

Coding & Algorithms
2
0
38 people solved
Nov 18, 2025
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Meta
Hard
Software Engineer Locked

Guide a mouse to find cheese with APIs

This question evaluates the ability to reason about graph exploration and stateful API interaction in an unknown 2D grid, assessing competencies in se...

Coding & Algorithms
3
0
45 people solved
Nov 12, 2025
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Meta
Medium
Software Engineer

Determine if subarray sums to target

You are given an array of non-negative integers and a non-negative integer target. Determine whether there exists a contiguous subarray (continuous se...

Coding & Algorithms
7
0
59 people solved
Nov 11, 2025
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Meta
Medium
Software Engineer

Find K-th Largest and Longest Vacation

Solve the following two coding problems. 1. Find the k-th largest element Given an integer array nums and an integer k, return the element that wou...

Coding & Algorithms
3
0
29 people solved
Nov 1, 2025
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Meta
Medium
Software Engineer

Find shortest subarray with range ≥ k

Problem You are given an integer array nums of length n and an integer k. Define the range of a subarray as: \[ \max(\text{subarray}) - \min(\text{sub...

Coding & Algorithms
3
0
34 people solved
Oct 23, 2025
Meta logo
Meta
Hard
Software Engineer

Answer key behavioral prompts effectively

Prepare responses for these behavioral prompts: 1. Proudest project: Describe the project you’re most proud of and why. 2. Conflict: Tell me about a t...

Behavioral & Leadership
2
0
23 people solved
Oct 21, 2025
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Meta
Hard
Software Engineer Locked

Design an ad click tracking system

This question evaluates a candidate's ability to architect a high-throughput, reliable ad event tracking system, including event modeling, streaming a...

System Design
2
0
33 people solved
Oct 21, 2025
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Meta
Medium
Software Engineer

Design an in-memory database with TTL and history

Design and implement an in-memory key–field–value store with monotonic timestamps. Keys and fields are strings; values are integers. Provide these API...

Coding & Algorithms
9
0
100 people solved
Sep 6, 2025
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Meta
Medium
Software Engineer

Implement power and balance-parentheses algorithms

Design and implement two algorithms: 1) Fast exponentiation: Implement a function pow(x, n) that returns a real number x raised to an integer exponent...

Coding & Algorithms
2
0
31 people solved
Sep 6, 2025
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Meta
Medium
Software Engineer

Implement BST vertical traversal and list conversion

Given the root of a binary search tree (BST): 1) Implement vertical order traversal: assign the root column 0, left child column −1, right child colum...

Coding & Algorithms
2
0
46 people solved
Sep 6, 2025
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Meta
Medium
Software Engineer

Design an O(1) recency-evicting cache

Design and implement a fixed-capacity in-memory cache that supports get(key) and put(key, value) in average O( 1) time. When capacity is exceeded, evi...

Coding & Algorithms
7
0
99 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Compute top-N active customers

Maintain and return the top N customers by cumulative activity amount, where activity is defined as the sum of deposit amounts, pay amounts, and trans...

Coding & Algorithms
5
0
40 people solved
Sep 6, 2025
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Meta
Medium
Software Engineer

Fill rooms with nearest gate distances

You are given an m×n integer grid representing rooms, where -1 is a wall, 0 is a gate, and INF (a large sentinel such as 2^31− 1) is an empty room. Fo...

Coding & Algorithms
1
0
26 people solved
Sep 6, 2025
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Meta
Medium
Software Engineer

Convert BST to sorted doubly list

Convert a binary search tree into a sorted doubly linked list in-place. Reuse the existing tree nodes: the left pointer becomes prev and the right poi...

Coding & Algorithms
3
0
32 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Solve BST range average and merge intervals

1) Given a binary search tree and an inclusive range [L, R], compute both the sum and the average of all node values where L <= val <= R. Use the BST ...

Coding & Algorithms
5
0
52 people solved
Sep 6, 2025
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Meta Software Engineer Interview Prep
Concept walkthroughs, worked examples, and the real questions.

Frequently Asked Questions

How difficult are Meta Software Engineer interview questions?
Meta Software Engineer interview questions are typically challenging and calibrated to the role level. Entry-level candidates face medium-to-hard algorithm and data-structure problems under time pressure, while mid and senior interviews add depth with larger-scale system design and architectural reasoning. Interviewers assess not only correct solutions but clarity of thought, trade-off analysis, coding quality, and communication. Expect to be evaluated on problem decomposition, complexity analysis, and edge-case handling. Difficulty varies by team and level, so prepare for both algorithmic rigor and practical engineering judgment when demonstrating solutions and trade-offs.
What does the Meta Software Engineer interview process look like and where does this role appear in the loop?
The typical process begins with a recruiter screen, followed by one or more technical phone or virtual screens that test coding and problem-solving. Successful candidates advance to a multi-round onsite or virtual “loop” consisting of two to three coding interviews, at least one behavioral interview, and for mid-to-senior roles one or more system or product design sessions. Software Engineer candidates therefore appear across coding rounds and design rounds, with behavioral rounds assessing impact and collaboration. Recently, some interviews may include an AI-assisted coding session as part of the loop, replacing a traditional coding round for select candidates.
What timeline should I follow to prepare for a Meta Software Engineer interview?
A structured timeline helps: for entry-level roles plan six to eight weeks of focused practice, for mid-level roles eight to twelve weeks, and for senior roles twelve weeks or more. Early weeks should emphasize algorithmic problem practice and mastering common patterns, followed by dedicated system design study and mock design interviews. In the final two weeks, increase timed mocks, rehearse behavioral stories with clear impact metrics, and simulate CoderPad-style sessions to build speed and clarity. Adjust intensity by your baseline skill level and aim for consistent practice rather than last-minute cramming.
What key subtopics should I focus on for a Meta Software Engineer interview?
Focus on core algorithms and data structures—arrays, strings, trees, graphs, heaps, hash tables, and dynamic programming—plus complexity analysis and memory trade-offs. For mid and senior candidates, prioritize system design: APIs, data modeling, storage choices, caching, load balancing, consistency, and monitoring. Also practice writing readable, testable code and debugging under time constraints. Prepare behavioral stories that show ownership and measurable impact. Depending on the team, expect domain-specific topics like concurrency, networking, or ML basics, so align study with the role description and past interview patterns.
What standout tips and common pitfalls should I be aware of when interviewing for Meta Software Engineer roles?
Standout tips include asking clarifying questions upfront, thinking aloud as you explore solutions, structuring your approach before coding, writing clean code with simple tests, and explicitly discussing complexity and trade-offs. Use mock timed interviews and practice on the same coding environment you’ll face. Common pitfalls are diving into premature optimization, remaining silent when stuck, failing to handle edge cases, and neglecting to align design choices with stated constraints. If you encounter an AI-assisted coding round, demonstrate how you validate AI suggestions and keep ownership of the solution and reasoning throughout the session.

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