Principal Software Engineer TS/SCI Polygraph

The Principal Software Engineer will serve as technical anchor for a new feature/capability being added to our product. Ideal candidate will be able to architect/design a new feature and translate complex business requirements into robust, documented technical designs. Responsibilities will include coordinating closely with members of an Integrated Feature Team (IFT) to ensure high-quality delivery through the lifecycle. This role requires an active/current TS/SCI Polygraph up front., * Architectural Analysis & Design: Deconstruct complex requirements to determine system impact. You will lead the creation of design documentation using Object-Oriented (OO) principles, ensuring new features integrate seamlessly without technical debt.

• Technical Shepherding: Act as the feature lead for a new capability. You are responsible for the “definition of done,” guiding a feature from initial concept through development, testing, and deployment.
• Cross-Team Coordination: Serve as the technical liaison to the Systems Engineering team to align on approach and constraints.
• Team Leadership & Tasking: Decompose high-level feature designs into actionable tasks for the development team. Manage feature status to leadership and mentor junior/mid-level peers.
• Quality Assurance: Conduct rigorous merge request (MR) reviews to maintain code standards, security protocols, and performance benchmarks.

• TS/SCI Clearance with polygraph
• Bachelor’s Degree or higher in computer engineering or in a field related to the computer engineering or computer science disciplines is required. Requires Bachelor’s degree with a minimum of 18 years of prior relevant experience or Masters with 15 years of prior relevant experience or Doctorate with 13 years of prior relevant experience.
• Expert in Java (17+ preferred), the Spring Boot ecosystem, SOLID principles, OO design patterns, and REST interface standards/best practices.
• Strong communicator with the ability to facilitate cross-team collaboration and clearly convey architecture and design concepts through both oral and written communication.
• Skilled in developing technical documentation (including wiki sites, blogs, and XML/HTML content) and mentoring junior to mid-level software development peers.

Desired Skillsets:

• Strong experience with MongoDB Data Architecture (schema design, indexing, and aggregation).
• Proficiency in Docker for local development and CI/CD pipelines.
• Familiarity with Kubernetes orchestration and the ELK Stack (Elasticsearch, Logstash, Kibana) for system monitoring and troubleshooting.
• Experience in PKI/TLS/SSL certificates
• Knowledge of ICAM Capabilities and Integration
• Familiarity using Confluence and Jira
• Strong organization and time management skills, including the ability to multi-task and work independently with minimum supervision to meet deadlines

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!

If you’re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 - and moving faster than anyone else dares.