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WALMART GLOBAL TECH · SENIOR SOFTWARE ENGINEER (SDE 3)

Walmart Global Tech senior engineer interview

The senior software engineer (SDE 3) level at Walmart Global Tech is Senior Software Engineer, for senior engineers with about 5 to 10 years of experience. The rounds at this level, how each one is scored, and the questions to practise first.

From public candidate reports and Walmart Global Tech's careers pages, checked November 2026. Processes vary by team. AlgoRung is not affiliated with Walmart Global Tech.

Track my Walmart Global Tech prep
Walmart Global Tech titleSenior Software Engineer
ExperienceSenior engineers with about 5 to 10 years of experience
Interviews after screeningAbout 4
System design roundYes

The Senior Software Engineer (SDE 3) rounds, in order

  1. Phone / recruiter screen · 30 min

    A recruiter screen on projects and experience.

    At Senior Software Engineer (SDE 3): Often a coding problem plus questions about your past systems; some companies (Uber) use it to set your level.

  2. Coding (DSA) · 60 min

    Two easy-to-medium problems, sometimes wrapped in a REST endpoint with validation and error handling.

    At Senior Software Engineer (SDE 3): Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

  3. Team-specific round · 60 min

    A Java and tech deep dive: streams, multithreading, HashMap internals, SOLID, Spring Boot, Kafka, Redis and SQL.

    At Senior Software Engineer (SDE 3): Project deep dives become central: scope, trade-offs and what you would do differently.

  4. System design (HLD) · 60 min

    System design for SE III and above, e.g. inventory management or a read-heavy multi-region feed.

    At Senior Software Engineer (SDE 3): One or two rounds that set your level. Expected to lead, size the system and go deep on two or three hard parts.

  5. Hiring manager · 60 min

    A project deep dive plus behavioral questions, sometimes with a design or coding question.

    At Senior Software Engineer (SDE 3): Technical leadership, mentoring, and how you choose what to work on.

What Walmart Global Tech interviewers look for

Behavioral rounds are based on the Company values: Respect the Individual, Act with Integrity, Serve Our Customers and Members, Strive for Excellence. Questions for each one.

Coding questions to practise for Walmart Global Tech Senior Software Engineer (SDE 3)

Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

Difficulty
Topic
8 questions
  1. First Missing Positive Hard Arrays & Hashing also Microsoft, Flipkart
  2. Next Greater Element I Easy Monotonic Stack also Oracle, Adobe
  3. LRU Cache Medium Design Data Structures also Amazon, Microsoft, Apple +4
  4. Implement Queue using Stacks Easy Stack also Goldman Sachs
  5. Lowest Common Ancestor of a Binary Tree Medium Trees & BST also Google, Meta, Netflix +1
  6. N-Queens Hard Recursion & Backtracking
  7. Binary Tree Zigzag Level Order Traversal Medium Trees & BST also Amazon
  8. Best Time to Buy and Sell Stock Easy Dynamic Programming also Amazon, Apple, Netflix

How the coding round is scored · The online assessment

System design at Senior Software Engineer (SDE 3)

Entry loops lean on DSA and Java depth with light design. SE III adds LLD or HLD, and Senior and above get a dedicated HLD round probing microservices, Kafka ordering, caching and active-active setups.

All Walmart Global Tech system design questions

Questions people ask

How many rounds are in the Walmart Global Tech Senior Software Engineer (SDE 3) interview?

About 4 interviews after the screening: phone / recruiter screen, coding (dsa), team-specific round, system design (hld), hiring manager.

Is there a system design round for Walmart Global Tech Senior Software Engineer (SDE 3)?

Yes. Entry loops lean on DSA and Java depth with light design. SE III adds LLD or HLD, and Senior and above get a dedicated HLD round probing microservices, Kafka ordering, caching and active-active setups.

What coding questions does Walmart Global Tech ask at Senior Software Engineer (SDE 3)?

The same question pool is used across levels; the bar rises with level. Most reported: First Missing Positive, Next Greater Element I, LRU Cache, Implement Queue using Stacks, Lowest Common Ancestor of a Binary Tree.

What does Walmart Global Tech expect in coding rounds at Senior Software Engineer (SDE 3)?

Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

Senior Software Engineer (SDE 3) interviews at other companies

Senior Software Engineer (SDE 3) interview questions across all companies · Behavioral questions