Walmart's Software Engineer interviews are notably inconsistent in format, and the clearest theme across candidate reports is how heavily the company relies on third-party assessment platforms — Karat and Glider both appear repeatedly, sometimes alongside more traditional recruiter-and-hiring-manager loops. Several candidates describe a Karat round as the first real technical gate, staffed by an interviewer unaffiliated with the hiring team, where a medium-difficulty HashMap or LeetCode-style problem is common; more than one report specifically flags vague instructions in these rounds, so restating requirements before coding is worth doing deliberately.
Beyond the assessment stage, technical rounds most often center on core data structures and algorithms — HashMaps and collision handling, LRU caches, BSTs, graph/cycle detection, and sliding-window string problems recur across many accounts — typically paired with a system design conversation on topics like a real-time inventory/stock-status service, a contact-tracing app, or an Uber-style ride-hailing design. Java fundamentals (OOP, concurrency, Spring Boot, and the Stream API) come up often enough that candidates without a strong Java background report being caught off guard, even when the job posting didn't emphasize the language. Behavioral questions are a near-constant presence, usually framed around teamwork, conflict resolution, and customer-facing scenarios rather than pure culture-fit chat, and for full-stack postings, recruiters may ask directly about comfort with frontend-heavy work.
Because the process clearly varies by team, hiring event, and whether the role is full-stack, backend, or contractor, treat any single candidate's round-by-round description as one data point among several rather than a fixed script. Practicing a couple of medium DSA problems, rehearsing a system design walkthrough, and preparing concrete stories about past project trade-offs covers most of what's actually been reported.
Synthesized from 46 candidate reports by our editorial team.
