Leidos Software Engineer interview typically runs 3-4 rounds: recruiter screen, phone screen, technical interview, panel interview. Timeline is about 1-6 months and the process is often resume-focused and conversational.
$100K
Avg. Base Comp
$143K
Avg. Total Comp
3-5
Typical Rounds
1-6 months
Process Length
We've seen a consistent pattern at Leidos: the interviewers care less about flashy algorithm performance and more about whether you can defend your own background with precision. Multiple candidates said the conversation kept returning to prior projects, stack choices, and even line-by-line resume details, whether they were discussing litigation work, a university final project, or the framework used at a previous company. That tells us Leidos is screening for practical ownership — can you explain what you actually built, why you built it that way, and how it connects to the role?
A recurring theme is that the technical bar is real, but it shows up in fundamentals rather than puzzle-heavy coding. Our candidates report questions on ELK, OAuth, Java and Spring basics, stack vs. heap, design patterns, smart pointers, and small coding exercises like arrays or string manipulation. The non-obvious make-or-break factor is comfort with the exact tools and concepts in the posting; one candidate specifically noted that matching the job description mattered more than grinding advanced problems. We also see a strong fit-check undercurrent: why Leidos, how you handle competing tasks, and whether your experience maps to the team’s domain. In other words, the strongest candidates sound grounded, specific, and credible — not overprepared for theory, but fully fluent in their own work.
Synthesized from 5 candidate reports by our editorial team.
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Featured question at Leidos
Write a function `sorting` from scratch to sort a list of strings in ascending alphabetical order
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|---|---|
| Hurdles In Data Projects | |
| Your Strengths and Weaknesses | |
| First Touch Attribution | |
| Employee Project Budgets | |
| P-value to a Layman | |
| Project Budget Error | |
| String Mapping | |
| Implementing the Fibonacci Sequence in Three Different Methods | |
| Slow SQL Query | |
| Seller Type Modeling | |
| Liker's Likers | |
| Why Do You Want to Work With Us | |
| Client Solution Pushback | |
| 2nd Highest Salary | |
| Employee Salaries | |
| Closest SAT Scores | |
| Empty Neighborhoods | |
| Subscription Overlap | |
| Top Three Salaries | |
| Merge Sorted Lists | |
| Rolling Bank Transactions | |
| Customer Orders | |
| String Shift | |
| Comments Histogram | |
| Random SQL Sample | |
| Like Tracker | |
| Weighted Keys | |
| Prime to N | |
| Upsell Transactions |
Synthesized from candidate reports. Individual experiences may vary.
Candidates apply through the Leidos portal or are contacted by a recruiter who asks a few basic screening questions about background and interest in the role. This stage is conversational and low-pressure, often including a chance to ask questions about the company and position.
Some candidates complete a digital interview with video questions, text responses, a code review section, and behavioral prompts. Others move directly into an early call with a software architect or technical lead who reviews the resume and asks basic stack-specific questions tied to the job description.
A live interview with one or more engineers focuses on fundamentals and practical problem solving rather than heavy algorithms. Candidates reported whiteboard-style questions, small coding exercises, and discussions of concepts like arrays, stack vs. heap, design patterns, OOP basics, and language-specific topics such as Java, C vs. C++, or smart pointers.
A panel with managers, project managers, technical directors, or multiple engineers mixes behavioral questions with role-specific technical discussion. Interviewers dig deeply into the resume, ask about handling competing tasks or difficult coworkers, and probe domain knowledge relevant to the team such as Salesforce, ELK stack, or OAuth.
Successful candidates receive an offer after the final interview stages. Several experiences note that the overall process can be slow with limited follow-up, but offers were ultimately extended after the panel or in-person rounds.