Walmart SSE HackerRank OA – DSA + Backend Repository Debugging. Anyone Else Got This?
- Posted
- 3 Nov 2026
Summary
I took a HackerRank Online Assessment for a Software Engineer (SSE) role at Walmart, which consisted of a DSA interval‑overlap problem and a Spring Boot repository debugging task.
How it went
Recently applied for a Software Engineer (SSE) role at Walmart and received a HackerRank Online Assessment. The OA had two parts:
1. DSA Problem
Given startTime[] and endTime[] arrays representing employees' working hours.
Find the maximum possible team size where every employee in the team can interact with every other team member (overlapping working hours).
Essentially, an interval-overlapping problem.
2. Backend Coding/Repository Task
A pre-existing Spring Boot repository was provided.
The task involved working with Spring Profiles (dev, qa, staging), configuring default profiles and properties, and completing service methods to retrieve user details and default configurations.
I'm curious about a few things:
- Has anyone else recently received a similar Walmart SSE HackerRank OA?
- Was this assessment common across candidates, or was it customized?
- Is the OA evaluation/interview process automated, or does an engineer review the repository-based submission?
- For those who have completed it, what was the next round like?
Would be helpful to hear from anyone who has recently gone through this process.
Questions asked (1)
- 01
Maximum Overlapping Team Size
Data Structures & Algorithms
Given two arrays
startTime[]andendTime[]representing the start and end times of employees' working hours, find the maximum possible team size such that every employee in the selected team has overlapping working hours with every other team member. In other words, find the largest subset of intervals where the intersection of all intervals is non‑empty.