Full Stack Software Developer

CACI International•Fairfax, VA

1d•$94,400 - $198,200•Onsite

About The Position

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.

Requirements

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

Nice To Haves

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

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