Full Stack Software Developer
CACI International· Defense· Sep 24, 2026 · 1mo ago
Fairfax, VA, US
In office
Full-time
Mid
$94K–$198K
Job description
Job Title: Full Stack Software Developer
Job Category: Engineering
Time Type: Full time
Minimum Clearance Required to Start: None
Employee Type: Regular
Percentage of Travel Required: Up to 25%
Type of Travel: Continental US
* * *
The Opportunity:
CACI is seeking a Full Stack Developer to support the Department of Homeland Security s Cyber Crimes Center (C3) in designing and implementing sophisticated web applications and investigative tools. As the Full Stack Developer, you will design and develop scalable, secure applications that support critical law enforcement investigations targeting criminal networks and dark web operations,
You will work within a collaborative technical team delivering mission-critical software for national security operations applying modern full stack development practices to solve complex investigative challenges in anonymized environments.
Responsibilities:
Design and implement complex web applications with advanced knowledge of frontend and backend technologies
Develop and maintain custom applications, tools, and sites to support DHS C3 investigative operations
Build applications using dark web technologies such as Tor for secure, anonymous communication
Build custom solutions that integrate with existing investigative systems and infrastructure
Develop RESTful APIs and microservices architecture to enable system integration and data exchange
Write clean, maintainable code in Python and JavaScript for investigative software systems Implement responsive user interfaces using modern frameworks (React, Angular, or Vue.js)
Develop server-side applications using frameworks such as Express.js, Django, or Flask
Maintain and deploy code using Docker, version control (Git/GitHub), and CI/CD pipelines
Design and optimize database schemas for performance and scalability
Integrate applications with existing investigative systems through APIs and system interfaces
Develop solutions that operate in anonymized and dark web environments while maintaining operational security
Collaborate with data scientists, infrastructure engineers, and cybersecurity specialists on cross-functional projects
Participate in code reviews, testing, and quality assurance processes
Document software architecture, APIs, and technical specifications
Troubleshoot and resolve software defects and performance issues
Support software development lifecycle from requirements gathering through production deployment
Ensure applications meet federal security standards and compliance requirements
Qualifications:
Required:
Bachelor s degree in Computer Science, Software Engineering, or related technical field
5 or more years of demonstrated full stack development experience with a proven track record of delivering production applications
2 or more years of experience developing dark web applications using technologies such as Tor for secure, anonymous communication
4 or more years of experience in frontend frameworks (React, Angular, or Vue.js) with strong JavaScript/TypeScript skills
4 or more years of experience in backend development experience with Python, Node.js, or Java
Strong understanding of RESTful API design and microservices architecture
Experience with relational databases (PostgreSQL, MySQL) and SQL query optimization
Proficiency with version control systems (Git) and collaborative development workflows
Experience maintaining and deploying applications using Docker and Kubernetes containerization
Strong understanding of software design patterns, data structures, and algorithms
Knowledge of web security best practices, secure coding principles, and anonymization technologies
Willing and able to work onsite in Fairfax, Va
Must be a U.S. Citizen with the ability to pass DHS background investigation, criteria include but are not limited to: 3 year check for felony convictions
1 year check for illegal drug use
1 year check for misconduct such as theft or fraud
Desired:
Master s degree in Computer Science or related technical field
Experience integrating AI/ML models into web applications and building interfaces for AI-powered systems
Knowledge of machine learning frameworks (TensorFlow, PyTorch, scikit-learn) and AI model deployment
Excellent problem-solving and debugging skills
Strong communication skills with ability to collaborate effectively across technical teams
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What You Can Expect:
A culture of integrity.
At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.
An environment of trust.
CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
A focus on continuous growth.
Together, we will advance our nation s most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.
Pay Range :
There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.
The proposed salary range for this position is:
$94,400 - $198,200
CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.
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Keywords to mirror
pythonjavascriptreactangularvuedockerci/cdtypescriptnode.jsjavaapisqlkubernetesaimlmachine learning
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