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

Senior Software Engineer (TS/SCI w/poly)

Full-time

Sixgen

SIXGEN’s mission is to deliver agile, mission-ready cybersecurity solutions that empower government and critical infrastructure organizations to stay ahead of advanced cyber threats. We combine innovation, deep expertise, and cutting-edge capabilities to uncover vulnerabilities, protect vital systems, and ensure operational superiority in an ever-evolving digital landscape.

POSITION OVERVIEW


Position: Software Engineer
Job Type: Full-time
Location: Ft. Meade, MD
Clearance Requirements: Active TS/SCI with Polygraph required
Work Schedule: 5 days per week onsite
Travel Requirements: None
Experience: 14+ years

WHAT YOU'LL DO


We are seeking a Software Engineer to support the implementation, troubleshooting, maintenance, and ongoing support of agile software development efforts focused on modernizing systems.

This role requires applying advanced software engineering principles, theories, and concepts while contributing to the development of new approaches and solutions. The ideal candidate will tackle highly complex technical challenges, operate with significant autonomy, and provide technical leadership and mentorship to team members when needed.

KEY RESPONSIBILITIES


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.

QUALIFICATIONS



  • 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.

PREFERRED QUALIFICATIONS



  • 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.

COMPENSATION & BENEFITS


At SIXGEN, we are committed to fair and equitable compensation practices. Compensation for this role will be based on experience, qualifications, technical expertise, and overall alignment with the position.

Additionally, SIXGEN offers top-tier benefits for full-time employees, including:


  • Employer-paid health insurance premiums (medical, dental, vision) for you and your family 

  • Employer-paid short/long term disability insurance and basic life/AD&D insurance

  • 401K with a 4% employer contribution

  • Professional development reimbursement options available (training, certification, education, etc)​

  • Flexible and remote work policies for most positions

  • Flexible PTO and holiday schedule

For more information, please reach out to our Director of Human Resources, Amy Maxwell at  View email address on jobs.jobcopilot.com .

OUR COMMITMENT


SIXGEN is an Equal Opportunity Employer. We ensure that all applicants are considered for employment without regard to race, color, religion, sexual orientation, gender identity, national origin, disability, age, marital status, ancestry, projected veteran status, or any other protected group or class.

We are committed to fostering an inclusive culture that values diversity in our people, reflecting the communities we serve and our customer base. We strive to attract and retain a diverse talent pool and create an environment where everyone is empowered to be their authentic selves at work.

Vacancy posted 21 hours ago
Similar jobs that could be interesting for youBased on the Senior Software Engineer (TS/SCI w/poly) in Remote vacancy
  • $90k - $185k

     ...operational superiority in an ever-evolving digital landscape. Position: Software Engineer Job Type: Full Time Location:  Onsite, Ft-Meade, MD Clearance Requirements:  TS/SCI w/ Poly Travel: None ABOUT THE TEAM SIXGEN supports missions by serving... 
    Suggested
    Full time
    Temporary work
    Work experience placement
    Remote work
    Flexible hours

    Sixgen

    Remote
    21 hours ago
  • $25k

     ...Software Engineer \- Offensive\/Defensive Cyber Operations \- 7+ yrs of Experience \- TS\/SCI w\/Poly Required \\\ \ \ Halogen Engineering Group is looking for a \\ Software Engineer who can perform vulnerability research with a focus on OCO (Offensive... 
    Suggested
    Full time
    Contract work
    Temporary work
    Work experience placement
    Remote work
    Shift work

    Halogen Engineering Group

    Linthicum, MD
    21 hours ago
  • $25k

     ...Software Engineer - DevOps - 20+ yrs of Experience - TS/SCI w/Poly Required Halogen Engineering Group is looking for a Software Engineer that develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics, novel algorithm... 
    Suggested
    Full time
    Contract work
    Temporary work
    Remote work
    Shift work

    Halogen Engineering Group, Inc

    Remote
    21 hours ago
  • $25k

     ...Software Engineer - Spring Boot Framework - 12+ yrs of Experience - TS/SCI w/Poly Required Halogen Engineering Group is looking for a Software Engineer to join our team who has experience with Spring Boot framework development experience. Location: Annapolis... 
    Suggested
    Full time
    Contract work
    Temporary work
    Remote work
    Shift work

    Halogen Engineering Group, Inc

    United States
    21 hours ago
  • $250k - $300k

     ...Annapolis Junction, MD. Clearance Requirements: TS/SCI w/ Poly Years of Experience: 7+ years Team Lead...  ...push the boundaries in our field. As a CNO Engineer, you’ll work in a unique position at the intersection of software development, binary and network protocol... 
    Suggested
    Full time
    Immediate start
    Work from home
    Flexible hours

    Sixgen

    Remote
    21 hours ago
  • $25k

     ...Software Engineer – Algorithm Development- 7+ yrs of Experience - TS/SCI w/Poly Required Halogen Engineering Group is looking for a Software Engineer who  develops, maintains, and enhances complex and diverse software systems (e.g., processing-intensive analytics... 
    Full time
    Contract work
    Temporary work
    Remote work
    Shift work

    Halogen Engineering Group, Inc

    Remote
    21 hours ago
  •  ...Description *Active TS/SCI w/ FS Poly required prior to application The Front-End (Angular) Software Engineer will design and develop complex new software products, or make significant enhancements to existing software. The ideal candidate is a hands-on developer... 
    Full time

    Leading Path Consulting

    Remote
    21 hours ago
  • $176k - $282k

     ...Candidate will become a member of a mature software development effort using Java as the...  ...applications using the Spring Framework.TS/SCI clearance with polygraph clearance is required...  ...ID: 2026-170074Position Category: Information TechnologyClearance: Top Secret/SCI w/Poly
    Contract work
    For contractors
    Remote work
    Flexible hours
    Shift work

    Peraton Corporation

    Annapolis Junction, MD
    3 days ago
  •  ...Description We are seeking  one (1) Software Engineer to provide  software development support for  MOON 1998 .  This position is...  ...AWS Cloud Development Kits (CDK) Requirements Active TS/SCI w/ FS Poly Demonstrated experience with  Systems Administration... 
    Full time

    Leading Path Consulting

    Remote
    21 hours ago
  • Senior Software Engineer - Top Secret/SCI w/Poly Job Locations: US-MD-Laurel Requisition ID: 2026-165845 Responsibilities The Data Warehouse Platforms Engineering...  ...members. Qualifications Basic Qualifications Active TS/SCI security clearance with polygraph is required.... 
    Senior
    Work at office
    Remote work

    Peraton

    Laurel, MD
    4 days ago
  • $112k - $179k

    ResponsibilitiesCloud Software Engineer 2 - Cyber Mission (Annapolis Junction, MD)Peraton is seeking...  ...TS/SCI clearance with current polygraphMinimum...  ...2026-165692Position Category: Information TechnologyClearance: Top Secret/SCI w/Poly
    Contract work
    For contractors
    Remote work
    Shift work

    Peraton Corporation

    Annapolis Junction, MD
    4 days ago
  •  ...Job Description Job Description Software Engineer - Kubernetes/Linux - 2+ yrs of Experience - TS/SCI w/Poly Required Halogen Engineering Group is looking for a Software Engineer shall be responsible for collaborating with Product Owners, System Engineers, and Project... 
    Contract work
    Remote work
    Shift work

    Halogen Engineering Group, Inc

    Annapolis Junction, MD
    5 days ago
  • $203k - $243k

     ...Job Type: Software Engineer Level 3 (US CITIZEN ONLY) Location: Ft Meade, MD Clearance Requirements : TS/SCI & Poly Years of Experience: 20 Work site requirement: 5 days a week in office Travel: None   Working with SIXGEN SIXGEN is committed to... 
    Full time
    Work at office
    Immediate start
    Work from home
    Flexible hours

    Sixgen, Inc.

    Maryland
    21 hours ago
  •  ...Description Data Engineer Chantilly, Va *Active TS/SCI w/ FSP required prior to application The Software Engineer will design and develop complex new software products, or make significant enhancements to existing software. The candidate must have strong,... 
    Full time
    Work at office

    Leading Path Consulting

    Remote
    21 hours ago
  •  ...Description *Active TS/SCI w/ Poly required prior to applying Description: Looking for a full stack developer supporting a backend development team focused on middleware and backend services. Requirements Mandatory Skills 1. Intermediate to Expert level... 
    Full time

    Leading Path Consulting

    Remote
    21 hours ago
  •  ...Technical Training, Certification(s) or Degree ● Required Experience: 5+ years of related experience ● Security Clearance Level: TS/SCI w/Poly ● Required Skills and Abilities: Proven experience with Azure cloud services and migration projects. Strong proficiency... 
    Relocation package

    General Dynamics Information Technology

    Annapolis Junction, MD
    more than 2 months ago
  • GRVTY is seeking a Senior Software Engineer in Laurel, MD, with TS/SCI + Poly clearance, to develop analytics and tools for compliance and business processing. You will prototype automation functions and test ML/AI algorithms in the RD environment, creating models and... 
    Senior
    Remote work

    GRVTY

    Laurel, MD
    2 days ago
  • $25k

     ...APIs - 8+ yrs of Experience (PARTIAL TELEWORK) - TS/SCI w/Poly clearance is required - BT Halogen Engineering Group is looking for a Web Developer to join our...  ...requirements. Requirements Software Integration (new and existing systems) Troubleshooting... 
    16 hours
    Full time
    Contract work
    Temporary work
    Remote work
    Shift work

    Halogen Engineering Group, Inc

    United States
    21 hours ago
  •  ...Job Description Job Description Software Engineer - Jira/Confluence - 7+ yrs of Experience - TS/SCI w/Poly clearance is required Halogen Engineering is seeking a Software Engineer who will be responsible for designing, developing, and maintaining Tools and Services... 
    Contract work
    Remote work
    Shift work

    Halogen Engineering Group, Inc

    Maryland
    6 days ago
  • $165k - $235k

     ...Description A day in the life: As a Senior Software Engineer, you will develop, maintain, and enhance complex and diverse software systems...  ...accepted in lieu of a degree ~ An active US Government TS/SCI security clearance with Polygraph The total package:... 
    Senior
    Full time
    Summer holiday
    Immediate start

    Red Alpha

    Remote
    21 hours ago
  • $146k - $234k

     ...discipline and 15 years of system administration experience. Five years of additional experience may be substituted for a BS.An active TS/SCI w/Poly is required.5+ years of combined experience in network administration (mid-level) to include working knowledge of Cisco switches... 
    Senior
    Contract work
    Remote work
    Shift work

    Peraton Corporation

    Annapolis Junction, MD
    2 days ago
  • $110.5k - $149.5k

     ...Server Systems Engineer SeniorHave you ever wanted the opportunity...  ...as a Server Systems Engineer Senior at GDIT. Here, you'll tailor...  ...with updating equipment and software. Troubleshoots moderately complex...  ...clearance level: TS/SCI w/PolyUS citizenship requiredRole... 
    Senior
    Temporary work
    Live in
    Immediate start
    Remote work
    Worldwide
    Flexible hours

    General Dynamics Information Technology

    Anchorage, AK
    2 days ago
  • $107.74k - $143.75k

     ...and SIP detailed traces is a plus.Security Clearance Level: TS/SCI w/Poly Location: On Site US Citizenship RequiredGDIT IS YOUR PLACE:...  ...operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.... 
    Senior
    Temporary work
    Work at office
    Immediate start
    Remote work
    Worldwide
    Flexible hours

    General Dynamics Information Technology

    Annapolis Junction, MD
    3 days ago
  • $107.74k - $143.75k

     ...Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be...  ...a plus. ● Security Clearance Level: TS/SCI w/Poly ● Location: On Site ● US Citizenship...  ...ready capabilities in AI, cloud, cyber and software development.Join our Talent Community to... 
    Senior
    Temporary work
    Work at office
    Immediate start
    Remote work
    Worldwide
    Flexible hours

    General Dynamics Information Technology

    Annapolis, MD
    21 hours ago
  •  ...Data Scientist / Software Engineer – Expert Falls Technology LLC Location: McLean, VA Clearance: Active TS/SCI with Polygraph required Falls Technology is looking for an experienced Data Scientist / Software Engineer to join our team supporting a mission... 
    Full time

    Falls Technology Llc

    Remote
    21 hours ago
  • $140k - $170k

     ...trusted results. We are looking for a dynamic  Senior AI/ML Software Developer with a TS/SCI with Poly clearance to join our team. The Senior AI/ML...  ...will work alongside a team of highly skilled engineers in the development of AI applications. A motivated... 
    Senior
    Full time
    Temporary work

    Cathexis

    Remote
    21 hours ago
  • GliaCell Technologies in Annapolis Junction, Maryland is seeking a Senior Software Engineer for a full-time role supporting a U.S. Government customer. The position requires an active TS/SCI with Polygraph clearance and offers exposure to modern tech stacks and mission-... 
    Senior
    Remote job
    Full time

    GliaCell Technologies LLC

    Columbia, MD
    2 days ago
  • $180k - $260k

    GliaCell Technologies is looking for an experienced Senior Software Engineer in Annapolis Junction, Maryland to support critical mission-related...  .... The role requires 14+ years of experience, an active TS/SCI clearance, and a Bachelor's degree in Computer Science or a... 
    Senior
    Remote job
    Full time
    Work from home

    GliaCell Technologies

    Annapolis, MD
    1 day ago
  •  ...Full Stack Software Developer / SME Falls Technology LLC Location: Chantilly, VA Clearance: Active TS/SCI with Polygraph required Falls Technology is looking for an experienced Full Stack Software Developer / SME to join our team supporting a mission-focused... 
    Full time

    Falls Technology Llc

    Remote
    21 hours ago
  • $158.86k - $214.92k

     ...Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able...  ...Required: None Job Family: Software Engineering Job Qualifications: Skills:...  ...hours, 9am - 3pm Security Clearance: TS/SCI with Polygraph US Citizenship Required... 
    Contract work
    Temporary work
    Work experience placement
    Immediate start
    Remote work
    Worldwide
    Flexible hours

    General Dynamics Information Technology

    Herndon, VA
    2 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Software Engineer (TS/SCI w/poly). Be the first to apply!