Senior Software Engineer (TS/SCI w/poly)

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.

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.

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

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.