Senior Software Engineer (SWE-4)

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!  

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!”

Job Responsibilities/Qualifications:

• Transition the functionality of the PostGIS database and the functionality of the Jupyter Notebook based on customer direction.
• Develop prototypes answering new questions as well as providing better answers to existing questions based on customer direction
• Develop a series of user facing query forms to leverage stored data to enable analysts to answer geospatial questions
• Provide development support to analytic front ends to verify conformity and performance to proposed GUI designs.
• Provide operational maintenance and support for Customized/Do It Yourself analytics.
• Provide subject matter expertise for metric generation, usage, and applications

What Sets You Apart:

• Bachelor's degree plus eleven (11) plus years of relevant experience or master’s degree plus 3-years of relevant experience.  An associate’s degree plus 7-years of relevant experience or high school diploma/GED plus 9-years of relevant experience may be considered for individuals with in-depth experience that is clearly related to the position
• Computer Science (CS) degree or related field
• Strong Python skills using Pandas & PySpark, developing software in Red Hat Linux (versions 3 – 5+)
• Experience with Jupyter Notebooks
• Experience with Machine Learning
• Experience with AWS EMR

Security clearance requirement:

• Candidates must possess an active TS/SCI with polygraph to be considered for this role.

You Might Also Have:​​

• Experience with GHOSTMACHINE analytic development
• Familiarity with Query Time Analytics and DX
• Familiarity with Redshift
• Familiarity with PostgreSQ

At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today!

Careers.leidos.com

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At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.

Original Posting:

August 26, 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 $126,100.00 - $227,950.00

The Leidos pay