Principal Software Engineer TS​/SCI Polygraph

Leidos has a new and exciting opportunity for a Principal Software Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our team works in Security Engineering, Computer Network Operations, Mission Software, Analytical Methods, Signals Intelligence and Cryptographic Key Management.

We offer competitive benefits, including Paid Time Off, 11 paid holidays, 401K with a 6% company match, Flexible Schedules and support for technical upskilling, education and training, parental paid leave, and more.

The Principal Software Engineer will serve as the technical anchor for a new feature/capability added to our product. The role requires a TS/SCI clearance with polygraph and involves architecting, designing, and delivering robust technical solutions.

• Architectural analysis and design: deconstruct complex requirements and create design documentation following OO principles.
• Technical shepherding: lead the feature from concept through development, testing, and deployment.
• Cross‑team coordination: serve as technical liaison to Systems Engineering and other stakeholders.
• Team leadership & tasking: break high‑level designs into tasks, manage status, and mentor junior/mid‑level peers.
• Quality assurance: conduct rigorous merge‑request reviews to maintain code standards, security, and performance.

• TS/SCI clearance with polygraph.
• Bachelor’s degree in computer engineering, computer science or related field, plus at least 18 years of relevant experience (or equivalent higher degree with fewer years).
• Expertise in Java (17+), Spring Boot, SOLID principles, OO design patterns, and REST best practices.
• Strong communication skills and ability to facilitate cross‑team collaboration.
• Experience developing technical documentation and mentoring peers.

• Mongo
  
  DB data architecture (schema design, indexing, aggregation).
• Docker for local development and CI/CD pipelines.
• Kubernetes orchestration and ELK stack for monitoring.
• Experience in PKI/TLS/SSL certificates.
• Knowledge of ICAM capabilities and integration.
• Familiarity with Confluence and Jira.
• Strong organization and time‑management skills.

Pay Range: $ – $

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, disability, 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.