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# Senior Software Engineer (TS/SCI w/poly)

- **Company:** SixGen, Inc
- **Location:** Fort Meade, MD, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Agile Methodology, Amazon Web Services, C Sharp (Programming Language), Cloud Computing, Cyber Security, Linux, Web Development, Perl (Programming Language), Internet Security, Spring Framework, Python (Programming Language), Lua (Scripting Language), Microsoft Software, MongoDB, Nginx, Software Architecture, Systems Development Life Cycle, Software Engineering, Software Systems, SQL Databases, ReactJS, Git, Vue.js, AngularJS, Information Technology, Front End Software Development, Osgi, Api Design
- **Published:** October 30, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-software-engineer-ts-sci-w-poly-md--59dba134-3080-450a-97d6-5a730cf219bd

## About the Role

Sensitive Compartmented Information (SCI), Software Engineering, Top Secret Clearance, Government, Internet Security, Computer Security, Security Attacks, System Operations, Sensitive Compartmented Information (SCI), Top Secret Clearance, * Bachelor's degree in Computer Science and 14+ years of software engineering experience; OR

 * 18+ years of software engineering experience in lieu of a degree.
 * Experience with Java and JavaScript in a Linux environment.
 * Experience writing source code for new applications and enhancing existing applications.
 * Experience using front-end and back-end technologies to develop complete software solutions.
 * Experience designing, modifying, developing, and implementing software applications using agile methodologies.
 * Experience solving complex technical problems within collaborative, cross-functional teams.
 * Active TS/SCI clearance with Polygraph., * Experience with Java libraries including MongoDB, Spring, and OSGi.
 * Experience with Perl, Python, Lua, and NGINX.
 * Experience with Git, SQL, and Software Development Lifecycle (SDLC) processes.
 * Experience with web application development technologies such as AngularJS, Angular, React, Vue.js, Microsoft C#, or related technologies.
 * Experience with API development, integration, client-side development, and server-side development.
 * Familiarity with AWS tools and cloud-based development environments.
 * Ability to work in a fast-paced, highly collaborative, and team-oriented environment while balancing competing priorities.

## Description

Software Development

 * Design, develop, modify, and implement software applications using agile development methodologies.
 * Write source code for new applications and enhance existing software solutions.
 * Utilize both front-end and back-end technologies to develop complete software solutions.
 * Support the modernization, maintenance, and enhancement of existing systems.

Engineering & Technical Problem Solving

 * Apply advanced software engineering principles to solve complex technical challenges.
 * Develop innovative approaches and solutions to meet mission requirements.
 * Contribute to software architecture, integration efforts, and application development activities.
 * Collaborate across cross-functional teams to deliver effective solutions.

Team Collaboration & Leadership

 * Work closely with technical teams in a collaborative development environment.
 * Provide guidance and mentorship to team members as needed.
 * Exercise sound judgment in technical decision-making and problem resolution.
 * Support both short-term and long-term development priorities.