Principal Software Engineer (SWE-4)

Leidos

$131K — $237K *
Information Technology
11 - 15 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree and 11 years of relevant development experience or equivalent
  • Active TS/SCI security clearance with Polygraph required
  • Strong proficiency in Java, Python, JavaScript, and shell scripting
  • Experience in Android development preferred
  • Knowledge of browser automation with Selenium and reverse engineering is a plus

Responsibilities

  • Perform security analysis of web services on Android and OSX platforms
  • Develop automation tools for data scraping
  • Interact with both public and private APIs
  • Manage software products and tools for mobile data discovery
  • Support DevOps environments within the team

Benefits

  • Eligible for a cash sign-on bonus up to $25K
  • Paid time off bonus available
  • Opportunities for professional growth in a fast-paced environment
  • Collaborative team culture focused on mission success
  • Engagement in advanced technology research and rapid prototyping
Full Job Description
Job Summary:

Our LOE program provides our customer's Operations organization with the best possible solutions for their mission needs. We achieve this through rapid prototyping, new development, and advanced technology research. From leading-edge visualizations to analytic development, we're always pushing the boundaries to find new and better data sources and tradecraft to answer intelligence questions. With a focus on collaboration and a fast-paced environment, our prototype development program is the ideal place to grow your skills and make a real impact. Click here to learn more about how this program "Delivers Mission Success!"

Seeking an experienced and talented software developer to join an existing team that develops and manages software products and tools integral to discovering new mobile data related to the mission. This role includes application development in support of the mission and managing the product's infrastructure and DevOps environment. You will be working in a highly collaborative, integrated environment.

*Qualified candidates are eligible for enhanced incentives including up to a $25K cash sign on bonus or a paid time off bonus.

Job Responsibilities/Qualifications:
  • Mission Focus: Perform security analysis of web services on Android and OSX platforms to develop automation tools to scrape data and interact with public and private APIs.
  • Technical Proficiency: Strong experience with Java, Python, JavaScript, and shell scripting
  • Qualifications: Bachelor's degree plus eleven (11) years of relevant development experience or equivalent.
  • Security Clearance: Candidates must possess an active TS/SCI with Polygraph to be considered for this role.
  • Desirable Skills: Additional experience with Android development, browser automation with Selenium, reverse engineering; familiarity with AI


Original Posting:
May 27, 2026

Pay Range:
Pay Range $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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