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Walmart interview notes, page 4 of 14

Large Enterprises

Most of these Walmart write-ups come from Software Engineers (91), then Product Managers (21) and Data Scientists (13). The most reported rounds are the technical phone screen (47), the hiring manager screen (23), the product sense round (16) and the system design round (13).

139 interview notes · updated Oct 2026

Walmart·Software Engineer·Technical Phone Screen

Apr 2026
Walmart Labs SWE interview, one algorithmic question that sounds easy until you actually think about the edge cases. They wanted the full treatment: algorithm, correctness argument, complexity analysis.
  • Given N bus routes each with a start time (inclusive) and end time (exclusive), find the maximum number of routes that are running at the same time. Walk through your algorithm, explain why it's correct, and give the time and space complexity.

“My first instinct was brute force, check every pair of intervals, which I knew was wrong but I said it anyway to buy time.”

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Walmart·Software Engineer·Hiring Manager Screen

May 2026
Interviewed for an engineering manager role at Walmart Labs. Just the one question I can recall, pretty standard leadership screen stuff.
  • How do you manage and lead your engineering team?

“I talked through how I balance giving people autonomy versus staying close enough to unblock them.”

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Walmart·Software Engineer·Technical Phone Screen

May 2026
Interviewed for a software engineer role at Walmart Labs. One coding question, fairly focused on binary search with a twist around duplicate handling.
  • Given a sorted array containing duplicates and a target number, return the index of the first occurrence of that target. For example, with target 8 in [1, 3, 5, 8, 8, 8, 8, 8, 9, 10, 15], you should return the index of the leftmost 8.

“I knew binary search immediately but the duplicate part is where I fumbled a bit.”

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Walmart·Software Engineer·Onsite - Multi Round

May 2026
Applied for a mid-level software engineering role, made it through an online assessment and system design just fine, then bombed the live coding round and got rejected. The feedback was weirdly kind about my architecture instincts but basically said my actual coding chops weren't there yet.
  • Design a scalable system architecture for a given problem, including messaging and caching components.
  • Live coding challenge requiring practical implementation of an algorithm or data structure under time pressure.
  • Requirement gathering and clarification during a technical problem-solving session.

“This was the part I actually felt good about.”

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Walmart·Product Manager·Hiring Manager Screen

May 2026
Interviewed for a PM role at Walmart Labs. Just one question I can remember clearly, felt like a pretty standard requirements-gathering scenario but it made me think harder than expected.
  • If a stakeholder or customer brings you a requirement, how do you approach it?

“I went with the obvious answer at first: clarify, prioritize, align.”

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Walmart·Software Engineer·Onsite - Behavioral / Leadership

May 2026
Walmart Labs software engineer interview, felt like a pretty standard senior-level loop covering the usual bases: past work, technical process stuff, and people management. Nothing too surprising but the mentorship question caught me a bit flat-footed.
  • Give a brief introduction of yourself and your background.
  • What's the accomplishment from a past project you're most proud of, and what made it meaningful to you?
  • Walk me through a specific challenge you ran into during project automation, how you figured out what was wrong, and what you did to fix or work around it.
  • How do you maintain code quality across the full development lifecycle, and how do you actually measure whether it's working?
  • Describe how you've helped onboard or mentor junior engineers. What was your approach, what did it look like in practice, and what came of it?

“Fine, did my usual rundown.”

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Walmart·Software Engineer·Technical Phone Screen

May 2026
Walmart Labs code review round where you get four files of deliberately bad code and about ten minutes to tear them apart. The breadth vs depth tradeoff is real and stressful.
  • You are given four source files with intentionally poor code. In roughly ten minutes, review all of them and identify the most critical issues across correctness, security, concurrency, performance, and readability. Prioritize by impact and propose concrete fixes.

“Ten minutes for four files sounds manageable until you're actually in it.”

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Walmart·Software Engineer·Technical Phone Screen

May 2026
First big tech technical interview and I completely fumbled it by overthinking the very first question. Spent the whole session chasing a solution that didn't exist instead of just going with the obvious approach.
  • Given an array or list, find pairs or combinations that satisfy a certain condition (a problem where the optimal solution requires nested iteration).

“I kept assuming there had to be a linear solution and burned the entire interview trying to find it.”

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Walmart·Product Manager·Hiring Manager Screen

May 2026
Interviewed for a PM role at Walmart Labs, one round focused on team planning and org thinking. Pretty short session from what I can tell, just the one question worth noting.
  • How do you plan your team composition?

“Stumbled a bit here because I went straight into headcount and roles without first anchoring on the product goals.”

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Walmart·Software Engineer·Technical Phone Screen

May 2026
Walmart Labs SWE interview, just one coding question the whole time. Pretty straightforward session but it definitely tests whether you actually know your sorting algorithms cold.
  • Implement merge sort from scratch.

“I've seen this question a dozen times and still fumbled the merge step a bit under pressure.”

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