Coding fluency
Implement an LRU cache. Explain your data structures, test capacity one, and walk through an eviction.
What a strong answer demonstrates
Correctness, edge cases, and time / space complexity.
Prepare for Walmart Labs with a focused mix of coding, design, and communication. Start with your job description and confirm the interview loop with your recruiter.
6 Practice picks
3 Interview reports
5 Levels mapped
01 / MAKE YOUR NEXT SESSION COUNT
Your preparation, made concrete.
System design
Design a notification service. Clarify delivery guarantees, model the data, then handle retries and duplicate events.
What a strong answer demonstrates
Clear requirements, a working baseline, and explicit trade-offs.
Behavioral storytelling
Describe a technical decision you changed after receiving feedback. Explain your contribution and the outcome.
What a strong answer demonstrates
Specific actions, honest reflection, and measurable impact.
BEFORE YOU PRACTICE
Ask your recruiter.
Get the details that a generic company guide cannot know.
- Which team and level is this opening for, and what does success look like?
- What rounds, durations, and evaluation criteria should I prepare for?
- Which languages, tools, and AI assistance are permitted?
- Will design focus on frontend, backend, infrastructure, or another specialty?
- Are there accommodations or preparation materials I should request?
Walmart Labs practice problems
Company-linked challenges and related lessons from our library. Not a prediction of your interview.
Challenge
Difficulty 7/10
Sum Right Side Leaves
Challenge
Difficulty 7/10
Maximum Sum of Absolute Difference of Values and Indices
Challenge
Difficulty 7/10
Hoisting and Call Stack
Challenge
Difficulty 5/10
Count the Planes
Challenge
Difficulty 8/10
Dutch National Flag Problem
Challenge
Difficulty 7/10
Build a Calculator
Real interview experiences
3 reports from candidates who interviewed at Walmart Labs.
What people at Walmart Labs say
Reviews originally posted on Glassdoor.
All in all the benefits are pretty decent, good 401K matching (up to 6% dollar for dollar always vested), discount in store (10% on produce and general merchandise, often expanded to more grocery during the holiday season)
Good work life balance if you are lazy to change jobs and wanna land on mid level place where you rest and vest ( not much )
Freedom with time management, kind of low expectations for tech knowledge, good place to gain experience for further corporate sde jobs
Good place to learn and grow, cutting edge technology and exciting projects
This office has a lot of opportunity, especially if you go in with a good attitude and a willingness to learn. You'll make a lot of very valuable industry connections, and gain some great experience working on high-traffic projects.
Inside the workplace
About Walmart Labs
A day at Walmart Labs