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
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Meta
Medium
Software Engineer

Validate word abbreviation and reconcile two abbreviations

Validate word abbreviation and reconcile two abbreviations Implement a function isValidAbbreviation(word: string, abbr: string) that returns true if a...

Coding & Algorithms
3
0
35 people solved
Jul 15, 2025
Meta logo
Meta
Hard
Software Engineer

Design an e-commerce price tracking service

Design a backend system for an e-commerce price-tracking service. Users can track products from a large online retailer, view historical prices, and r...

System Design
1
0
29 people solved
Mar 23, 2025
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Meta
Medium
Software EngineerSenior+

Choose the Cheapest Round Trip

Choose the Cheapest Round Trip You are given two arrays of equal length. departure[i] is the cost of departing on day i, and return_cost[j] is the cos...

Coding & Algorithms
1
1
17 people solved
Jul 6, 2026
Meta logo
Meta
Medium
Software Engineer AI Locked

Solve a Key-Door Corridor Maze

This question evaluates graph search and state-space reasoning by requiring shortest-path computation in a constrained one-dimensional maze with colle...

Coding & Algorithms
2
0
33 people solved
May 14, 2026
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Meta
Medium
Software Engineer

Solve Array Merge and Parentheses Cleanup

You are asked to solve two coding problems. Problem 1: Merge Three Sorted Arrays Given three integer arrays, each sorted in nondecreasing order, merge...

Coding & Algorithms
1
0
13 people solved
Apr 29, 2026
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Meta
Easy
Software Engineer

Solve Tree View and Triplet Sum

You are asked to solve two coding problems. Problem 1: Return the nodes visible from the right Given the root of a binary tree, return the values of t...

Coding & Algorithms
0
0
10 people solved
Apr 24, 2026
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Meta
Medium
Software Engineer

Solve Array, Matrix, and Recommendation Problems

During an onsite coding interview, solve the following independent tasks. Problem 1: In-place unique prefix You are given a nondecreasing integer arra...

Coding & Algorithms
0
0
16 people solved
Apr 17, 2026
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Meta
Hard
Software Engineer AI Locked

Implement a Timestamped Banking System

This question evaluates the ability to design and implement an in-memory, time-ordered stateful system handling event scheduling, transactional update...

Coding & Algorithms
3
0
35 people solved
Apr 8, 2026
Meta logo
Meta
Medium
Software EngineerSenior+ AI

Infer an Unknown Alphabet Order

You are given a list of words that is already sorted according to an unknown alphabet. Derive one valid ordering of the characters in that alphabet. R...

Coding & Algorithms
1
0
20 people solved
Apr 8, 2026
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Meta
Medium
Software Engineer Locked

Solve delimiter and CSV tasks

This question evaluates skills in string parsing and bracket balancing, CSV/file parsing and joining, computation of derived values, and sorting, emph...

Coding & Algorithms
6
0
52 people solved
Apr 5, 2026
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Meta
Easy
Software Engineer Locked

Implement array parity and tree level views

This question evaluates proficiency in array frequency analysis and binary tree traversal, testing skills in data structures, correctness reasoning, a...

Coding & Algorithms
5
0
38 people solved
Mar 24, 2026
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Meta
Medium
Software Engineer

Solve Four Online Assessment Problems

Complete the following four independent coding tasks. For each task, write a function that returns the requested result. 1. Find the best value index ...

Coding & Algorithms
10
0
84 people solved
Mar 19, 2026
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Meta
Medium
Software Engineer AI Locked

Solve array, tree, and maze problems

This question evaluates algorithmic problem-solving across arrays, binary trees, and grid pathfinding, testing competencies in array traversal and vis...

Coding & Algorithms
5
0
53 people solved
Mar 12, 2026
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Meta
Easy
Software Engineer

Implement an in-memory database with record locking

Implement an in-memory key–record database that supports basic CRUD on fields plus an exclusive lock per record. You are given a sequence of queries. ...

Coding & Algorithms
9
0
102 people solved
Mar 8, 2026
Meta logo
Meta
Medium
Software Engineer

Merge Two Lists of Non-Overlapping Intervals

You are given two lists of closed integer intervals, a and b. Each interval is represented as a pair [start, end] with start <= end, and it covers eve...

Coding & Algorithms
1
0
13 people solved
Mar 6, 2026
Meta logo
Meta
Medium
Software Engineer

Minimum Round-Trip Flight Cost

You are planning a round trip and want to spend as little as possible on flights. You are given two integer arrays of equal length n: - departure[i] —...

Coding & Algorithms
0
0
5 people solved
Mar 6, 2026
Meta logo
Meta
Medium
Software Engineer AI

Maximum Length of a Word Selection With All Unique Characters

You are given an array of lowercase strings words. Select a subset of these words (zero or more, chosen in any order) and concatenate them. The select...

Coding & Algorithms
0
0
7 people solved
Mar 6, 2026
Meta logo
Meta
Medium
Software Engineer

Construct a BST and read spiral order

The coding round reportedly included two algorithmic tasks: 1. Rebuild a binary search tree from a preorder sequence - You are given an array of di...

Coding & Algorithms
17
0
115 people solved
Mar 4, 2026
Meta logo
Meta
Hard
Software Engineer

Check and infer custom alphabet

You are working with an unknown language that uses a custom alphabetical order, such as ['a', 'd', 'c', 'b', ...]. Implement the following: 1. Check s...

Coding & Algorithms
4
1
67 people solved
Feb 28, 2026
Meta logo
Meta
Medium
Software Engineer

Design a chat messaging system

Design a chat system similar to WhatsApp/Messenger. Requirements: - 1:1 and group chats. - Send/receive messages in real time when online; store-and-f...

System Design
6
0
43 people solved
Feb 25, 2026
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Meta Software Engineer Interview Prep
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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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