Full-Stack Software Developer (Contingent)

Worky; Springfield (VA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

401K with company match

Health, vision, dental insurance

Career growth and LEAP program

Job summary

SPHINX is seeking a contingent Full-Stack Software Developer to design, develop, and maintain mission-critical applications for a federal counterintelligence customer in a classified environment. You will work across front-end interfaces, back-end services, and data layers, delivering secure, scalable tools.

Start date TBD and position contingent on contract award. Ideal candidates have TS/SCI with CI poly, 8+ years in full-stack development, and proficiency with Docker/Kubernetes, DevSecOps,

Qualifications

• 8+ years of software development experience across the full stack.
• Experience with container orchestration using Docker and Kubernetes.
• DevSecOps and CI/CD pipeline experience.
• Secure coding experience aligned to OWASP and NIST 800-53.
• DoD 8140 compliance — Security+ or equivalent.

Responsibilities

• Design, develop, and maintain full-stack applications in a classified environment.
• Build responsive front ends (React, Angular, Vue) and back-end services (Python, Java).
• Deploy and manage containerized applications.
• Build and maintain DevSecOps and CI/CD pipelines for secure delivery.
• Apply secure coding practices aligned to OWASP and NIST 800-53 controls.
• Architect and implement Zero Trust network and application design.
• Collaborate with security officers and data engineers to translate requirements into working software.

Skills

Full-stack development

DevSecOps

CI/CD pipelines

Secure coding

Security+ / DoD 8140

Education

BS in Computer Science or related field

Tools

Docker

Kubernetes

Job description

Full-Stack Software Developer (Contingent)

Location: 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 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

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.