Principal Software Engineer

Leidos has a new and exciting opportunity for a 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!  

Are you ready to design, build, and optimize advanced software systems that power real-world intelligence and mission-critical operations? As a Principal Software Engineer, you'll take on high-performance computing, large-scale data manipulation, and real-time systems, pushing boundaries and driving innovation.

Primary Responsibilities

• Develop and enhance sophisticated software solutions for analytics, data processing, and intelligence operations.

• Analyze user requirements to craft high-performing software that meets real-world needs.

• Debug and refine complex systems, optimizing performance and eliminating inefficiencies.

• Design and implement new features that integrate seamlessly into evolving environments.

• Develop robust database queries and optimize large-scale data repositories for efficiency.

• Lead software development efforts, ensuring technical excellence and adherence to best practices.

• Author and refine documentation to improve software processes and methodologies.

Basic Qualifications

• 20+ years of experience in software development, working on high-impact projects.

• Bachelor’s degree in Computer Science or a related field (or equivalent experience).

• Expertise in Java, with a deep understanding of modern software engineering principles.

• TS/SCI with Polygraph clearance required.

• Strong ability to design, develop, and modify software for advanced computing environments.

• Proven experience in optimizing software systems for speed, accuracy, and efficiency.

• Ability to create and implement complex algorithms with strict system performance requirements.

Preferred Qualifications

• Proficiency in C++, JBoss, AWS, Agile Scrum methodologies.

• Experience with Git, Linux, Jira, Confluence, Eclipse, and cutting-edge development tools.

• Background in stream-based processing frameworks and advanced database architectures.

• Familiarity with JavaScript, TypeScript, HTML, and CSS for full-stack development capabilities.

If you're a problem-solver, a strategist, and an engineer who thrives on pushing technology forward, this is the role for you. Join a team where your expertise drives impact and innovation. Apply today!

CONMD

CSSRC

Original Posting:

May 28, 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 $148,850.00 - $269,075.00

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.