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NEXTMOVEFDE careers · United States

Principal Software Engineer TS/SCI Polygraph

AI summary of the role

Leidos seeks a Principal Software Engineer to serve as technical anchor for a new feature/capability in the National Security Sector's Cyber & Analytics Business Area.

No longer in the current catalog. Last included 2026-09-09. Check the employer’s posting for availability.

What you’ll do

  • Architect and design new features using Object-Oriented principles, ensuring seamless integration without technical debt.
  • Act as feature lead, guiding a new capability from concept through development, testing, and deployment.
  • Serve as technical liaison to the Systems Engineering team to align on approach and constraints.
  • Decompose high-level feature designs into actionable tasks and manage feature status to leadership.

What you’ll bring

  • Active TS/SCI Clearance with polygraph.
  • Bachelor's degree in computer engineering or related field with 18+ years experience (or Master's with 15+, or Doctorate with 13+).
  • Expert in Java (17+ preferred), Spring Boot, SOLID principles, OO design patterns, and REST interface standards.
  • Strong communicator with ability to convey architecture and design concepts orally and in writing.

Technologies

Java · Spring Boot · SOLID · REST · MongoDB · Docker · Kubernetes · ELK Stack · PKI/TLS/SSL · Jira · Confluence

About Leidos

Builds mission-critical technology, engineering, cyber, defense, health, and infrastructure systems for U.S. government, allied, and commercial customers.

Public · 5000+ people

Source and classification

Internal deployment & tooling · Evidence for this classification:

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 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! 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
More from the job description

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 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! 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. Key Responsibilities Architectural Analysis & Design: Deconstruct complex requirements to determine system impact. You will lead the creation of design documentation using Object-Oriented (OO) principles, [... source excerpt omitted ...] d mentor junior/mid-level peers. Quality Assurance: Conduct rigorous merge request (MR) reviews to maintain code standards, security protocols, and performance benchmarks. Basic Qualifications 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 standar [... source excerpt omitted ...] 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.

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