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
Hard
Software EngineerSenior+

Design a content processing service

System Design: High-Throughput Content Processing Service Context Design a content processing and moderation service for a large-scale media app. Cont...

System Design
4
0
46 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Software EngineerSenior+

Design a secure ML data platform

System Design: Secure, Ethical, Multi‑Tenant ML Data and Inference Platform Context Design a cloud-based ML platform used by multiple internal product...

ML System Design
5
0
40 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Merge two interval lists into a union

You are given two lists of closed intervals [start, end]. Each list is individually sorted by start and contains non-overlapping intervals. Merge the ...

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

Compute nested depth-weighted sum

You are given a nested structure containing integers and lists (e.g., [1, [4, [6]]]). Define depth of the top-level as 1. Compute the total sum of all...

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

Design LCA and find K closest points

Part A — LCA with parent pointers: You are given two nodes a and b in a rooted tree where each node has a parent pointer (you may or may not have dire...

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

Compute left and right views once

Given the root of a binary search tree, output two lists: the nodes visible from the left side and the nodes visible from the right side, from top to ...

Coding & Algorithms
4
0
32 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Reverse between equal-value nodes in list

Given the head of a singly linked list and a target value v, locate the first two nodes whose values equal v (call them A and B, with A before B) and ...

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

Count subarrays equal to target

Given an integer array nums and an integer k, return the number of contiguous subarrays whose sum equals k. Provide an algorithm better than O(n^ 2), ...

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

Navigate unknown grid to locate target

You control a mouse in an unknown 2D maze. You do not know the maze dimensions or your absolute coordinates. The interface exposes move() → bool (atte...

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

Find top-K frequent values with tiebreaks

Question Given an integer array nums and an integer k, return the k values with the highest frequency. The array can contain up to 10^6 elements. When...

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

Design a ticketing purchase system

System Design: High-Concurrency Ticket Purchasing With Seat Maps You are asked to design an end-to-end ticketing system for large on-sale events (e.g....

System Design
6
0
52 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Software Engineer

Implement sparse vector dot product

Question Design a SparseVector class for vectors of integers in which most entries are zero, and support an efficient dot product between two such vec...

Coding & Algorithms
2
0
39 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Software Engineer

Compute BST range sum

Given the root of a binary search tree and two integers low and high (inclusive), compute the sum of values of all nodes with low <= val <= high. Prov...

Coding & Algorithms
3
0
29 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Software Engineer

Implement basic expression evaluator

Implement a function to evaluate a string expression containing non-negative integers, '+', '-', '*', '/', and spaces. Multiplication and division hav...

Coding & Algorithms
4
0
30 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Software Engineer

Solve windowed duplicates and target expression

1) Windowed duplicate check: Given an integer array nums and an integer k, determine whether there exist indices i and j such that nums[i] == nums[j] ...

Coding & Algorithms
2
0
31 people solved
Aug 13, 2025
Meta logo
Meta
Medium
Software Engineer

Find the kth largest element

Given an unsorted array of n integers and an integer k (1 ≤ k ≤ n), return the k-th largest element without fully sorting the array. Design two method...

Coding & Algorithms
3
0
26 people solved
Aug 12, 2025
Meta logo
Meta
Medium
Software Engineer

Validate a simplified numeric string

Implement isValidNumber (s) that returns true if and only if the ASCII string s represents a valid number under these simplified rules: - Optional lea...

Coding & Algorithms
5
0
59 people solved
Aug 12, 2025
Meta logo
Meta
Hard
Software Engineer

Implement held transfers with accept/cancel

Implement held transfers with accept/cancel Design and implement a two-phase ("pull-style") money-transfer system in which funds are first held on the...

System Design
6
0
42 people solved
Aug 9, 2025
Meta logo
Meta
Medium
Software Engineer

Sort a string by custom order

Sort a string by custom order Given a priority string P of distinct characters and a text string S, reorder S so that all characters appearing in P co...

Coding & Algorithms
3
0
39 people solved
Aug 7, 2025
Meta logo
Meta
Medium
Software Engineer

Find power-of-two subarrays within sum range

Find power-of-two subarrays within sum range Given an integer array nums and an integer k, find all subarrays whose length is a power of two and whose...

Coding & Algorithms
3
0
29 people solved
Aug 7, 2025
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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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