Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Full Stack Software Engineer Sr. - TS//SCI Clearance

Lockheed Martin

Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities, where we can do more – we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future‑ready solutions, focusing on resiliency and urgency through our 21st Century Security® vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation, and we’re reimagining how space can connect us, ensuring security and prosperity. Join us in shaping a new era in space and find a career that's built for you. Within Space Security, the Black Canyon program is a new and growing program. We are looking to expand our team of dedicated full‑stack software engineers to meet our customer’s needs. The team works to develop and integrate existing software with newly developed components and user interfaces to provide a much‑needed capability. We are developing cloud‑native components using modern software tools and practices. As a member of the software scrum team, you’ll contribute to implementing software features that create these new systems. Your work will involve defining and implementing application programming interfaces (APIs) as part of a microservices architecture, using modern web frameworks, CI/CD pipelines, and automated unit tests to provide a cloud system that meets enterprise milestones. Basic Qualifications Programming Languages/scripting – JavaScript/Node, C# Modern Web Frameworks – Angular/React/Vue.js/Ember.js GitLab pipeline for software project Currently active Top Secret security clearance, with SCI eligibility Agile scrum experience and proficiency with Agile tools (Jira, Version One, Confluence) Desired Skills 3+ years of professional front‑end development experience with React (hooks, functional components) or Angular (components, services, RxJS) Deep understanding of client‑side architecture and best practices for performance, accessibility, and responsive design Proven expertise in state management (e.g., Redux, MobX, NgRx, Context API, RxJS) and ability to design scalable, maintainable data flows Strong proficiency in HTML5, CSS3 (Flexbox/Grid, preprocessors/Sass), and modern JavaScript/TypeScript standards (ES6+) Experience building single‑page applications (SPAs) with routing, lazy loading, and code‑splitting techniques Familiarity with UI component libraries (Material UI, Ant Design, Bootstrap) and ability to create custom, reusable components Comfortable writing unit and integration tests for UI code (Jest, React Testing Library, Karma/Jasmine) and using CI pipelines for front‑end validation Ability to collaborate closely with UX/UI designers, back‑end engineers, and product owners to translate requirements into polished UI features Strong problem‑solving mindset, attention to detail, and commitment to code quality (linters, style guides, code reviews) Excellent communication skills and a proactive attitude toward learning emerging front‑end technologies and trends. Experience working in a Top Secret environment This position requires a government security clearance; you must be a U.S. citizen for consideration. Clearance Level: TS/SCI Shift: First Lockheed Martin is an equal‑opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics. #J-18808-Ljbffr Lockheed Martin

Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Full Stack Software Engineer Sr. - TS//SCI Clearance in King of Prussia, PA vacancy
  •  ...Description ***This job requires active TS/SCI clearance. Please apply only if you have an...  ...Technology is looking for a TS/SCI Cleared Software Engineers to support a critical mission. The...  ...processes, procedures, and tools across the full development life cycle. • Leveraging... 
    Suggested
    Contract work
    Flexible hours

    North Point Technology

    King of Prussia, PA
    24 days ago
  •  ...Description Job Description ***This job requires active TS/SCI clearance. Please apply only if you have an active TS/SCI...  ...North Point Technology is looking for a TS/SCI Cleared Software Engineers to support a critical mission. The GEOINT Collection neXt... 
    Suggested
    Contract work
    Flexible hours

    North Point Technology

    King of Prussia, PA
    24 days ago
  •  ...customers can dominate the full Electromagnetic Spectrum (EMS...  ...collaborative, multidisciplinary engineering environment and are...  ...integration Experience in software practices and configuration...  ...Must currently have an active TS/SCI Clearance Desired Skills Red Hat OS... 
    Suggested
    Full time
    Flexible hours
    Shift work
    3 days per week

    Lockheed Martin

    King of Prussia, PA
    5 days ago
  •  ...Position Overview The Staff AI/ML Engineer (LLMs) will lead the development of...  ...interdisciplinary team of researchers and software developers and working with a...  ...g., llama.cpp, vllm, TGI). Active TS/SCI U.S. Government Security Clearance. Preferred Qualifications M.S. or... 
    Suggested
    Relocation package
    Flexible hours

    NLP PEOPLE

    King of Prussia, PA
    3 days ago
  • Senior Software Algorithm Engineer (TS/SCI) {S} Job Category: ENG Requisition Number: SENIO...  ...: November 28, 2025 Full-Time On-site Locations Showing...  ...developers, and full-stack/cloud-native developers to...  ...computing An Active TS/SCI Clearance Willingness to obtain a Counter... 
    Senior
    Full time
    Temporary work
    Work at office
    Remote work
    Visa sponsorship
    Relocation package
    Flexible hours

    TSG

    King of Prussia, PA
    4 days ago
  • Lockheed Martin is seeking an experienced Software Engineer in King of Prussia to drive innovation in satellite mission...  ...and programming languages like C# or Java. A TS/SCI security clearance is required for this full-time position. #J-18808-Ljbffr Lockheed Martin
    Senior
    Full time

    Lockheed Martin

    King of Prussia, PA
    5 days ago
  •  ..., we aim to harness the full potential of space to cultivate...  ...an exceptional team of engineers implementing solutions...  ..., develop & demonstrate software capabilities to both...  ...working in Agile teams Active TS/SCI with a favorably Poly security clearance to start. (Must be a US... 
    Senior
    Full time
    Work at office
    Relocation
    Shift work

    Lockheed Martin Corporation

    King of Prussia, PA
    5 days ago
  •  ...aerospace and defense company seeks a candidate with at least 3 years of experience in software development to enhance their DevSecOps practices. The role requires Top Secret Clearance and knowledge of tools like Kubernetes and Ansible. Responsibilities include... 
    Senior

    Lockheed Martin

    King of Prussia, PA
    3 days ago
  •  ...company is seeking a Senior Systems Engineer in King of Prussia, PA. This role involves...  ...with Agile teams on mission-critical software and AI/ML product development. The...  ...in the field and hold an active TS/SCI with CI Poly clearance. The role offers flexible schedules and... 
    Senior
    Relocation package
    Flexible hours

    TSG

    King of Prussia, PA
    5 days ago
  •  ...searching for a Senior Infrastructure/DevSecOps Engineer in King of Prussia, PA. The role involves delivering complex software applications and requires 5+ years of...  ...DevOps, strong Kubernetes skills, and an active TS/SCI clearance. Ideal candidates will possess strong... 
    Senior
    Relocation package
    Flexible hours

    ARKA

    King of Prussia, PA
    5 days ago
  •  ...have a background in DevOps/DevSecOps and must possess an active TS/SCI clearance with Polygraph. Proficiency in cloud platforms, specifically...  ...solutions that emphasize resilience and urgency. This full-time position offers opportunities for relocation. #J-18808-Ljbffr... 
    Senior
    Full time
    Relocation

    Lockheed Martin

    King of Prussia, PA
    2 days ago
  • Lockheed Martin is seeking a full-stack software engineer in King of Prussia, PA to join the Black Canyon program. You'll be integral to developing...  ...scrum experience, and an active Top Secret security clearance. Join a team that thrives on innovation and ensures security... 
    Senior

    Lockheed Martin

    King of Prussia, PA
    1 day ago
  • Principal Software Engineer (TS/SCI) {S} Job Category: ENG Requisition Number: PRINC003225 Posted: February 9, 2026 Full-Time Locations Stratagem Group KoP 900 E 8th Ave King Of Prussia...  ...teams Active TS/SCI Security Clearance with ability to obtain CI Poly Preferred... 
    Full time
    Temporary work
    For subcontractor
    Work at office
    Visa sponsorship
    Relocation package
    Flexible hours

    CACI International

    King of Prussia, PA
    4 days ago
  •  ...seeking a talented and motivated Software Engineer to join our dynamic team. As a key...  ...new features Understanding of the full software development lifecycle (SDLC...  ...work in office full time Active TS/SCI U.S. Government Security Clearance Willingness to be submitted for... 
    Full time
    Temporary work
    Work at office
    Visa sponsorship
    Relocation package
    Flexible hours

    ARKA Group, L.P.

    King of Prussia, PA
    1 day ago
  •  ...Overview: The Principal AI/ML Engineer will support the development of AI/...  ...years of experience, preferably in software development or as a data scientist...  ...Polars, scikit-learn, etc.) Active TS/SCI U.S. Government Security Clearance Preferred Qualifications:... 
    Temporary work
    Work at office
    Local area
    Remote work
    Visa sponsorship
    Relocation package
    Flexible hours

    ARKA Group

    King of Prussia, PA
    1 day ago
  • An advanced technology company is seeking a Senior Software Algorithm Engineer to lead the development of innovative algorithms across various...  ...over 5 years of relevant experience including an active TS/SCI clearance. This on-site position is based in King of Prussia,... 

    TSG

    King of Prussia, PA
    4 days ago
  •  ...Pennsylvania is seeking a Systems Engineer to perform tech planning, design, development...  ...fields and the ability to obtain a TS/SCI Security Clearance. This full-time position offers flexible work...  ...candidates will have experience in software languages including Java and Python... 
    Full time
    Relocation
    Flexible hours

    Lockheed Martin

    King of Prussia, PA
    2 days ago
  • Lockheed Martin in King of Prussia is seeking an experienced software engineer to work on innovative solutions for space technology....  ...operational plans and optimizing satellite constellations. A TS/SCI clearance is required, and applicants must be U.S. citizens. #J-188... 

    Lockheed Martin

    King of Prussia, PA
    5 days ago
  •  ...Position Overview: This position is for a Staff AI/ML Engineer looking for new challenging problems. You should have...  ...control (e.g. git, GitLab, Bitbucket) ~ Active TS/SCI U.S. Government Security Clearance Preferred Qualifications: M.S. or PhD in relevant... 
    Temporary work
    Work at office
    Visa sponsorship
    Relocation package
    Flexible hours

    The Stratagem Group

    King of Prussia, PA
    5 days ago
  • Lockheed Martin in King of Prussia seeks an experienced IT Systems Administrator with strong Linux skills and a TS/SCI Clearance. This full-time role focuses on managing IT systems, ensuring security through patching and hardening of Linux environments while providing support... 
    Full time
    Flexible hours

    Lockheed Martin

    King of Prussia, PA
    4 days ago
  •  ...seeking a Staff Infrastructure/DevSecOps Engineer located in King of Prussia, PA. Candidates...  ...skills in Kubernetes, and an active TS/SCI clearance. This role involves working closely with a talented team to deliver software applications and offers various benefits... 
    Relocation package
    Flexible hours

    TSG

    King of Prussia, PA
    5 days ago
  • CACI International is seeking an AI/ML Engineer located in King of Prussia, PA. The role focuses on developing...  ...of experience in AI/ML applications along with a required active TS/SCI with CI Poly U.S. Government Security Clearance. #J-18808-Ljbffr CACI International

    CACI International

    King of Prussia, PA
    3 days ago
  • A leader in advanced technologies is seeking an AI/ML Engineer to develop algorithms in machine learning, reinforcing capabilities...  ...relevant experience. Candidates must possess an active TS/SCI with CI Poly security clearance. The position is based at the King of Prussia campus,... 
    Relocation package
    Flexible hours

    TSG

    King of Prussia, PA
    5 days ago
  • Staff Infrastructure/DevSecOps Engineer (TS/SCI with Full Scope Poly) {S} Job Category : ENG Requisition...  ...a talented team to deliver a complex software application into operations. In...  ...Active TS/SCI U.S. Government Security Clearance with Fully Adjudicated Full Scope Polygraph... 
    Full time
    Temporary work
    Work at office
    Remote work
    Visa sponsorship
    Relocation package
    Flexible hours

    TSG

    King of Prussia, PA
    5 days ago
  •  ...of Prussia is seeking a Dev Sec Ops Engineer to migrate mission-focused analytics...  ...-native platform. You will work with Software Engineers and Data Scientists in designing...  ...cloud-native infrastructures and hold a TS/SCI with Poly clearance. #J-18808-Ljbffr Lockheed Martin

    Lockheed Martin

    King of Prussia, PA
    4 days ago
  •  ...6, 2026 Employment Type: Full-Time Locations Showing 1...  ...Overview: The Staff AI/ML Engineer (LLMs) will lead the development...  ..., preferably in software development or as a data...  ...GitLab, Bitbucket) Active TS/SCI U.S. Government Security Clearance Preferred Qualifications:... 
    Full time
    Temporary work
    Work at office
    Visa sponsorship
    Relocation package
    Flexible hours

    TSG

    King of Prussia, PA
    3 days ago
  • Lockheed Martin in King of Prussia is looking for a Software Developer to join our Agile team, focused on developing innovative...  ...be US citizens and hold an active Top Secret security clearance with the ability to obtain SCI clearance. Join us in advancing capabilities in the... 

    Lockheed Martin

    King of Prussia, PA
    4 days ago
  • Lockheed Martin in King of Prussia is seeking a full-time candidate for a security software role, focusing on coding and automation technologies. The successful...  ...certification and an active Top Secret security clearance. This position offers a flexible work schedule and... 
    Senior
    Full time
    Flexible hours

    Lockheed Martin

    King of Prussia, PA
    4 days ago
  •  ...leading aerospace and defense company seeks a Senior Software Engineer in King of Prussia, PA. This role focuses on developing...  ...containerization technologies, and possess a government security clearance. The position offers full-time hours with potential relocation available. #J-188... 
    Senior
    Full time
    Relocation

    Lockheed Martin Corporation

    King of Prussia, PA
    1 day ago
  •  ...Lockheed Martin Space is seeking full‑time Software Engineers. In this role, you will...  ...obtain a government security clearance Active Top Secret clearance...  ...to obtain and maintain SCI clearances Active/Final Secret...  ...consideration. Clearance Level: TS/SCI Work Information... 
    Senior
    Full time
    Work at office
    Remote work

    Lockheed Martin

    King of Prussia, PA
    20 hours ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Full Stack Software Engineer Sr. - TS//SCI Clearance. Be the first to apply!