Principal Software Engineer

Overview

Leidos has a new and exciting opportunity for a Software Engineer (SWE) in our Intelligence Sector, Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management.

At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and more. Join us and make a difference in National Security!

This position is eligible for a sign on bonus of $25,000.

• Collaborate with developers to design, implement, and validate features in React and related front-end libraries.
• Support integration of UI components with back-end services written in Java and/or C++.
• Participate in Agile development teams, contributing to sprint planning, code reviews, and daily stand-ups.
• Document test cases, results, and processes to support ongoing quality assurance.
• Explore and apply other front-end automation tools as appropriate to improve efficiency.

• Bachelor s degree in Computer Science or related discipline from an accredited college or university is required. Four (4) years of additional SWE experience on projects with similar software processes may be substituted for a bachelor s degree. Masters Degrees may count toward experience requirements.
• 20 years of relevant experience
• Clearance Requirement: Active Top Secret/SCI clearance with Polygraph.

• Experience with front-end development and/or UI testing.
• Familiarity with React, Java, and/or C++.
• Ability to write test scripts in Python (Robot Framework experience strongly preferred).
• Hands-on experience with Robot Framework for UI automation.
• Exposure to other front-end automation tools (e.g., Selenium, Cypress).
• Knowledge of modern web technologies:
  JavaScript, Type Script, HTML, CSS.
• Experience working in Agile development environments.

For U.S. Positions:
Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay range $ - $. 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 offering an offer include 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.

About Leidos:
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

Pay and Benefits:

Pay and benefits are fundamental to any career decision. That s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at

Securing Your Data:
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Commitment to Non-Discrimination:
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider qualified applicants with criminal histories consistent with relevant laws.