Sr. Software Engineer TS​/SCI Polygraph

Overview

Leidos has an exciting opportunity for a Sr. Software Engineer! Must have an active TS/SCI Polygraph up front. No exceptions.

• You will perform software development lifecycle (SDLC) activities as both an individual and a member of our agile development team building a large complex enterprise system.
• Develop the full range from Agile user stories to concepts, through development, unit testing, integration and test, and deployment of new capabilities for the large complex enterprise system.
• Follow Behavior-driven Development (BDD) patterns and implement robust testing leveraging Dev Ops automation and appropriate test automation tools.
• Develop server-side business logic as well as client web application and user interface (UI) development using technologies such as Java, Python, embedded C/C++, Java cryptographic framework, XML, and web UI (Angular, JavaScript, CSS, HTML, etc.).
• Participate actively in daily stand-ups, Sprint Planning, Program Increment (PI) Planning, and other related team activities.
• Analyze complex system requirements, use design software tools, and apply formal specifications and data flow diagrams to ensure code is modifiable, efficient, reliable, understandable, fault tolerant, and reusable.
• Provide software process management and control throughout the coding portion of the software development process, promote code reuse and cross-program collaboration, and reduce maintenance costs by creating common functions and shared actions for developers and testers.
• Engineer, author, tune and document automation scripts in a development environment and deploy to the test/production bench.

• Must have a BS degree and 12 - 15 years of prior relevant experience or Masters with 10 - 13 years of prior relevant experience. Additional experience may be substituted for a degree.
• Must have demonstrated experience with Java.
• Must have experience or familiarity with multiple Java frameworks:
  Spring (Boot and Data), Java EE (JPA, EJB, JTA, Servlet), Jackson, Jersey, Swing, JavaFX.
• Must have experience or familiarity with multiple languages such as JavaScript, Python, C/C++, Groovy, SQL.
• Must have experience with development IDEs such as Eclipse, Visual Studio Code, Visual Studio, Rhapsody, Web Storm.
• Must have experience with databases such as Oracle, Postgre
  
  SQL, Mongo
  
  DB, SQL Server.
• Must have experience with Web Application User Interface Development and related technologies (Spring, Angular
  
  JS, JSON, HTML, XML, XSLT).
• Must have experience with software source control and configuration management tools.
• Must have experience with cryptographic technology foundations (symmetric and asymmetric cryptography, ASN.
  1 encoding, XML canonicalization, digital signatures).
• Must have experience developing on Windows and/or Linux operating systems.
• Must have documented professional experience with web services.
• Must have a strong understanding of sound software development principles and practices.
• Must be able to plan and prioritize personal tasking and communicate effectively verbally and in writing.
• Must be an independent thinker, capable of performing high quality work, both independently and with a team in a fast-moving environment.

• Experience with the following:
  Java EE (EJB, JPA, JTA, JAX-B, JAX-RS, JAX-WS), SQL, application servers (Tomcat, Web Logic, JBoss), Spring framework, scripting.
• Experience or familiarity with technologies: XML/XSD/SOAP/WSDL/XSLT, REST, JSON, YAML, Containers (Docker, Podman, Kubernetes, Open Shift).
• Experience with Java script frameworks:
  Angular
  
  JS, Bootstrap, JQuery.
• Experience with Testing and Mocking frameworks: JUnit, Jupiter, Mockito, Jasmine, Karma, Cucumber, UFT, Selenium, FITNesse.
• Experience with build tools:
  Maven, CMake, RPM, Jenkins, Nexus.
• Experience with high-level requirements management including decomposition, secure systems engineering, trade-off analysis, interface control, and CI/testing.
• Experience with Agile practices such as Pair Programming, TDD, Refactoring, ATDD, and BDD.
• Experience with Secure Software development (Layer 7 Policy).
• Experience with Scrum and SAFe methodologies, SAFe Agilist Certification, or experience as an Agile team member.

Original Posting:
June 11, 2025