Full Stack Software Developer Fairfax, VA, US

CACI International Inc.; Fairfax, Northern (VA, KY); Hybrid; USD 94,000 - 198,000; Full time

Job summary

CACI International Inc. seeks a seasoned Full Stack Software Developer in Fairfax, VA, to design and implement scalable web applications supporting DHS C3 investigative operations.

You will work in a collaborative team to build secure, high-performance software for national security challenges in anonymized environments. The role requires 5+ years in full stack development, 2+ years with dark web tech (Tor), 4+ years in frontend frameworks (React/Angular/Vue), and 4+ years backend in

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or related field.
• 5+ years of demonstrated full stack development experience.
• 2+ years of experience developing dark web applications using Tor.
• 4+ years of frontend frameworks (React, Angular, or Vue.js) with strong JavaScript/TypeScript skills.
• 4+ years of 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.

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.

Skills

Full stack development

Dark web development

Frontend frameworks

Backend development

RESTful APIs

SQL databases

Git / CI/CD

Docker / Kubernetes

Web security

Anonymization tech

Education

Bachelor's degree in CS/SE

Master's degree (preferred)

Tools

Docker

Kubernetes

Job description

## Full Stack Software DeveloperFairfax, VA, USApply NowFind out how well you match with this jobJob ID: 332532Job Title: Full Stack Software DeveloperJob Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: NoneEmployee Type: RegularPercentage 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-**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.*