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Sphinx LLC

Full-Stack Software Developer

Posted 13 hours ago
10+ years experience
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Design, develop, and maintain full-stack applications within both corporate and classified environments. Collaborate with security officers and stakeholders to implement secure, scalable software solutions using modern web technologies and DevSecOps practices.

Full-Stack Software Developer 

Location: Remote / On-Site – Springfield, VA

Clearance Requirement: TS/SCI with CI Polygraph 

Salary Range: Commensurate with experience


ABOUT THE ROLE

As a Full-Stack Software Developer you will design, develop, and maintain mission-critical applications supporting Sphinx internal development and federal customers. Activities will span front-end interfaces, back-end services, and data layers. This is hands-on development in a mix of corporate and classified environments, building secure and scalable tools that drive real mission outcomes.


WHAT YOU'LL DO

  • Design, develop, and maintain full-stack applications in corporate & classified environments 
  • Build responsive front ends (React, Vite, MUI), back-end services (Node, Express, PostgreSQL), and integrate shared tooling (TypeScript)
  • Deploy and manage containerized applications 
  • Build and maintain DevSecOps and CI/CD pipelines for secure continuous delivery 
  • Apply secure coding practices aligned to OWASP guidelines and NIST 800-53 controls 
  • Architect and implement Zero Trust network and application design 
  • Partner with program security officers, data engineers, and mission stakeholders to translate requirements into working software


REQUIRED QUALIFICATIONS

  • Active TS/SCI clearance with a current CI Polygraph (within the last 5 years) 
  • U.S. Citizenship (required for clearance eligibility) 
  • 8+ years of software development experience across the full stack
  • AI-augmented development experience
  • Docker / Kubernetes container orchestration
  • DevSecOps and CI/CD pipeline experience
  • Secure coding experience (OWASP, NIST 800-53) 


PREFERRED QUALIFICATIONS

  • Software development on Intelligence Community programs 
  • Iron Bank / DCAR hardened container experience 
  • Infrastructure as Code (Terraform, Ansible) 
  • Zero Trust architecture implementation (NIST 800-207) 
  • AI/ML integration into software platforms 
  • CISSP, Certified Kubernetes Security Specialist (CKS), or AWS Solutions Architect
  • BS in Computer Science or a related field 


ABOUT SPHINX

Sphinx is a mission-focused intelligence, counterintelligence, and cyber solutions firm founded in 2018 by professionals from the Special Operations, Intelligence, and Cyber Warfare communities. We partner with Defense, Intelligence, and Commercial clients to deliver exceptional personnel and transformative mission capabilities that advance complex, multi-domain intelligence and security missions. As a small business, Sphinx offers direct mission impact, technical leadership opportunities, and an operator-driven culture that larger companies cannot match. 


WHAT SPHINX OFFERS

  • Career Growth: Sphinx's Level-Up Employee Advancement and Performance (LEAP) Program provides structured career progression tied to technical certification achievement, mission performance, and leadership cultivation.
  • Compensation: Market-benchmarked salary against the cleared workforce ecosystem with annual reviews calibrated to TS/SCI and CI/FSP market dynamics.
  • Solution-Focused Culture: Sphinx prioritizes direct leadership access and promotes a Be-Know-Do culture where experienced professionals are empowered to propose and implement solutions that contribute directly high-consequence mission outcomes. 


BENEFITS HIGHLIGHTS

We offer a competitive benefits package to include a 401K with corporate match, company paid health, vision, dental, disability, and other insurance options. Sphinx also offers a variety of incentives and opportunities to support the development and well-being of our personnel. 


WHY Choose SPHINX?

Sphinx combines large business impact with small team collaboration. At Sphinx, we don't manage bureaucracy. We lead from a position of technical strength by delivering solutions that drive a measurable impact on every high-consequence mission we support. 


Sphinx LLC is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.


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