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# Software Engineer Sr - Level 3 (Top Secret)

- **Company:** Lockheed Martin
- **Location:** King of Prussia, PA, United States
- **Experience:** Expert
- **Salary:** $110,300.0 - $204,900.0
- **Contract:** Permanent contract
- **Skills:** Testing (Software), Java (Programming Language), JavaScript (Programming Language), Agile Methodology, Artificial Intelligence, Amazon Web Services, Unit Testing, Microsoft Azure, Bash Shell, Cloud Computing, Databases, Computer Engineering, Continuous Integration, JavaScript Libraries, PostgreSQL, MySQL, Node.Js, OpenShift, OpenStack, E2e Testing, Software Engineering, Web Applications, Data Processing, Curam Configuration Tools, ReactJS, Delivery Pipeline, Kubernetes Helm Charts, Gitlab, Git, Computer Equipment, AngularJS, Integration Tests, Kubernetes, Information Technology, Playwright, Rancher, Atlassian Tools, Front End Software Development, Api Design, Restful APIs, Cucumber (Software), Software Version Control, Docker, Microservices
- **Published:** August 27, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9096605/software-engineer-sr-level-3-top-secret

## About the Role

* Recent experience using Java, JavaScript, and Node.js, for full-stack software development

 * Experience with Git/Gitlab/Git Bash for software version control

 * Experience with CI/CD - deployment pipelines, automated build, and configuration tools

 * Experience with application containerization (e.g., Docker, Kubernetes, Helm, Rancher, etc.) in a cloud environment (AWS/Azure/Openstack/Openshift)

 * Bachelor's degree in computer science, computer engineering, another engineering discipline, or equivalent experience

 * Familiarity with software test best practices, including unit test, integration test, and end-to-end test

 * Experience working in an Agile development environment, using tools such as Jira and Confluence

 * Active Top Secret security clearance required to start

Desired Skills

 * Three years' experience developing software on the Whiskey program

 * Experience as a maintainer on the Whiskey Program

 * Active Whiskey program clearance

 * Experience with API design and development, such as RESTful APIs

 * Experience with microservices and microservice architecture

 * Recent JavaScript library experience with web-based components (e.g., Lit, React, Angular)

 * Experience with Lit for JS front-end

 * Experience with CesiumJS

 * Experience with HTML/CSS

 * Experience with Quarkus for backend Java development

 * Experience with Helm charts for infrastructure as code (IaC)

 * Knowledge of database management systems, such as PostgreSQL or MySQL

 * Familiarity with the Space Domain

 * Ability to communicate effectively and work in a collaborative environment

 * Experience in running unit tests with Playwright and/or integration testing with Cucumber

 * Experience working on large-scale software projects with multiple teams and stakeholders

 * Proficient in AI prompting as it applies to this position and practice

#LMSpaceSoftwareEng

#SpaceSecurity

#SpaceNSS

## Description

Plans, conducts, and coordinates software development activities. Designs, develops, documents, tests, and debugs software that contains logical and mathematical solutions to business/mission problems or questions in computer language for solutions by means of data processing equipment. Applies the appropriate standards, processes, procedures, and tools throughout the development life cycle. Applies knowledge of computer hardware and software, subject matter to be programmed in business/mission applications, information processing techniques used, and information gathered from system users to develop software. Corrects program errors, prepares operating instructions, compiles documentation of program development, and analyzes system capabilities to resolve questions of program intent, output requirements, input data acquisition, programming techniques, and controls. Ensures software standards are met.


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