Full-Stack Software Developer (Contingent)

Location: On-Site – Springfield, VA

Clearance Requirement: TS/SCI with CI Polygraph

Salary Range: Commensurate with experience

As 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.

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

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.

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.

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.