Software Engineer​/Computer Scientist; Q-TS​/SCI Poly

Software Engineer/Computer Scientist (Active Q-TS/SCI with Poly)

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Are you passionate about solving complex problems and applying your expertise to develop innovative solutions? Join our dynamic team and help solve critical challenges to enhance our nation's security!

We are seeking an experienced Software Engineer (R&D S&E Computer Science) to design and implement cutting‑edge solutions for high‑consequence national security challenges. In this role, you will collaborate with U.S. government customers to develop impactful capabilities that directly support warfighters, strengthen national security, and deliver measurable results for critical missions. Your contributions will foster innovation, leverage teamwork, and cultivate creativity while addressing key mission needs.

• Utilize your skillset in software system architecture, software system implementation, technical documentation, unit and integration testing, reliability and performance assessment, and/or systematic technology insertion to enhance mission capabilities utilizing code bases ranging from 0.5 to 1.0+ million lines of code.
• Collaborate with technical design teams and subject matter experts to create innovative solutions that meet mission requirements and address end‑user needs.
• Collaborate with Software Engineers, System Engineers, Information Technology staff, management, and customers to implement solutions that address requirements. Architect software systems, develop code, write unit tests, and create software tools to support the mission.
• Provide on‑call support for software discrepancy resolution in the production environment.
• Develop and execute test plans/procedures, create reports, and write software documentation.
• Perform system integration and testing.
• Apply system design principles to architect scalable, reliable, and secure solutions for critical missions.
• Develop and refine system CONOPS (Concept of Operations) to ensure technical solutions address operational needs.
• This position requires willingness and ability to work in a 24/7/365 on‑call support role to provide software discrepancy resolution.
• Due to the nature of the work, the selected applicant must be able to work onsite 100% of the time at the Livermore, CA site.
• Ability and willingness to travel, up to 25%, required.

• Bachelor's degree in a relevant discipline and five (5) years of directly relevant experience, or an equivalent combination of directly relevant education and engineering or scientific experience that demonstrates the knowledge, skills, and ability to perform independent research and development.
• Active DOE Q/SCI security clearance or equivalent DOD Top Secret/SCI security clearance, and willingness to take a polygraph test.

• An ideal candidate will have 10+ years' experience in front‑end, back‑end, or full stack development in software engineering for code bases with 0.5 to 1.0+ million lines of code and the ability to quickly understand and contribute to complex software systems.
• Expertise in front‑end development, with proficiency in Dust, JavaScript, Type Script, JQuery, HTML5/CSS, or Angular.
• Expertise in back‑end web application development using frameworks and tools such as Spring MVC, Tomcat, Jetty and coding with languages such as Java, Python, C++.
• Experience with implementing custom Java applications using Apache Ignite 2 or 3, and/or experience modifying Apache Ignite open‑source software.
• Relevant experience with fixing bugs or implementing new features in open‑source software repositories of 2.5 million lines of code.
• Hands‑on experience with Oracle databases including PL/SQL.
• Experience with Web Services, including WSDL, SOAP, and REST.
• Experience with any of the following:
  Hazelcast, Apache Karaf, Apache Camel, Mina/Netty, OSGI, JMX, JDBC, Apache Aries, Log4J2, Apache CXF, Docker.
• Excellent communication skills and a demonstrated ability to develop technical ideas and results and present them in oral and written form in a concise manner.
• Ability to navigate ambiguous situations and collaborate effectively with stakeholders and internal/external mission partners.

• If you have a Medical Portable Electronic Device (MedPED), such as a pacemaker, defibrillator, drug‑releasing pump, hearing aids, or diagnostic equipment and other equipment for measuring, monitoring, and recording body functions such as heartbeat and brain waves, if employed by Sub‑contractor you may be required to comply with NNSA security requirements for MedPEDs.
• If you have a MedPED and you are selected for an on‑site interview at Sub‑contractor, there may be additional steps necessary to ensure compliance with NNSA security requirements prior to the interview date.