Senior Software Engineer

Description

Leidos has a new and exciting opportunity for a Senior Software Engineer in our National Security Sector’s (NSS) 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 much more.
Join us and make a difference in National
Security!

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

Leidos is seeking a driven and experienced Software Engineer to support a high‑stakes, mission‑critical program. In this role, you’ll architect, develop, and integrate advanced AI/ML solutions that shape national security and drive meaningful innovation. Join an Agile team where your expertise won’t just be valued—it will be vital.

• Design, develop, integrate and enhance secure AI/ML applications and systems in support of evolving operational environments
• Implement and optimize complex algorithms, including deep learning models
• Debug and optimize software for performance and reliability
• Collaborate in Agile Scrum teams to deliver rapid, high‑quality releases
• Create and maintain system documentation and technical reports

• Bachelor’s degree in Computer Science or related discipline (or 4 additional years of experience in lieu of degree)
• 14+ years of software engineering experience supporting programs of similar type and scope
• Proficiency in Python and modern programming languages
• Clearance Requirement:
  Active TS/SCI clearance with Polygraph

• AWS experience implementing production‑scale AI/ML systems
• Experience with Kubernetes, Docker, and cloud infrastructure management
• Knowledge of AI/ML frameworks (Tensor Flow, PyTorch, Hugging Face)
• Familiarity with generative AI platforms (e.g., ChatGPT, Gemini, Grok)

Original Posting:

December 17, 2025

For U.S. Positions:
While subject to change based on business needs, 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 onlyand 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.

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 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

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment‑related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the  automated system — never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via Whats App, Telegram, etc.

If you received an email purporting to be…