Leidos Software Engineer Intern Interview Questions (2026)
Arlington, VA·9 interview reviews·Medium difficulty
Software Engineer Intern Interview Reviews
9Online assessment was tough, but the onsite technical was two standard LC-style problems. Interviewer wanted clear communication before coding.
“Longest Substring Without Repeating Characters - Find the length of the longest substring without repeating characters”
One round with two problems in 45 min. If you've practiced patterns you're fine — narrate your approach before you code.
“Merge Two Sorted Lists - Merge two sorted linked lists into one sorted list”
One round with two problems in 45 min. If you've practiced patterns you're fine — narrate your approach before you code.
“Describe a challenging project you worked on and how you overcame obstacles”
Online assessment was tough, but the onsite technical was two standard LC-style problems. Interviewer wanted clear communication before coding.
“Design TinyURL - Design a URL shortening service like bit.ly”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“LeetCode medium — tree / graph style problem”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“LeetCode medium — tree / graph style problem”
One round with two problems in 45 min. If you've practiced patterns you're fine — narrate your approach before you code.
“BFS/graph or linked list manipulation”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“LeetCode medium — tree / graph style problem”
One round with two problems in 45 min. If you've practiced patterns you're fine — narrate your approach before you code.
“BFS/graph or linked list manipulation”
About This Role
Frequently Asked Questions
How hard is it to get hired as a Software Engineer Intern at Leidos?
The interview difficulty is rated 3/5 by candidates. 58% report a positive experience. Emphasize Data Structures and Algorithms in your prep.
How long does the Leidos Software Engineer Intern hiring process take?
The process typically takes 2–6 weeks from application to final decision, depending on the hiring cycle and team availability.
What is the interview process like?
Most candidates go through a recruiter screen, followed by technical coding rounds, and a final interview loop. 72% of candidates applied online.
What questions are asked in a Leidos Software Engineer Intern interview?
Common topics include data structures & algorithms, system design for some teams, and behavioral STAR stories. Practice with our AI voice interviewer to tighten delivery.
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