Senior Software Engineer - Security Clearance

Position: Senior Software Engineer - 25k Sign on Bonus with Security Clearance
Location: Aurora

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- 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.

Primary Responsibilities
* 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 Basic Qualifications
* 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 Desired Qualifications
* AWS experience 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) CONMD
CSSRC Come break things (in a good way). Then build them smarter. We're the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.” 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:
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 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.

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 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…