Full-Stack Software Developer (Contingent)Location: On-Site - Springfield, VA
Clearance Requirement: TS/SCI with CI Polygraph
Salary Range: Commensurate with experience
ABOUT THE ROLEAs a Full-Stack Software Developer you will design, develop, and maintain mission-critical applications supporting a federal counterintelligence customer - spanning front-end interfaces, back-end services, and data layers. This is hands-on engineering in a classified environment, building secure and scalable tools that drive real mission outcomes.
Please note this position is contingent upon contract award. Start Date TBD.WHAT YOU'LL DO- Design, develop, and maintain full-stack applications in a classified environment
- Build responsive front ends (React, Angular, Vue) and back-end services (Python, Java), and integrate the two
- 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)
- BS in Computer Science or a related field
- 8+ years of software development experience across the full stack
- Docker / Kubernetes container orchestration
- DevSecOps and CI/CD pipeline experience
- Secure coding experience (OWASP, NIST 800-53)
- DoD 8140 compliance - CompTIA Security+ or equivalent
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
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 HIGHLIGHTSWe 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.
