Senior Fullstack Software Engineer Jobs in Chantilly, VA

Job Title: Full-Stack Web Developer - WordPress

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

* * *

The Opportunity
CACI is seeking a proactive, cleared Full‑Stack Web Developer who thrives in a fast‑paced environment and enjoys collaborating to create high‑impact solutions. In this role, you will design, build, test, and enhance web applications that directly support mission‑critical needs. You’ll work closely with analysts, project leads, designers, and customers to deliver intuitive, reliable, and secure applications that meet business goals and elevate user experience. This position sits 100% onsite in Chantilly due to our customer's requirements.

Responsibilities

• Contribute to all phases of the development lifecycle—from concept and design through deployment and support
• Write clean, efficient, and testable code using HTML5, CSS, PHP, and JavaScript
• Develop and maintain both front‑end and back‑end functionality
• Ensure all solutions meet required specifications and comply with Section 508 accessibility standards
• Collaborate within a team environment that values innovation, shared learning, and continuous improvement
• Support timely delivery of solutions for time‑sensitive project
• Participate in code reviews to uphold quality, consistency, and accountability
• Estimate story points and make informed recommendations throughout the development process
• Identify and resolve systems issues to ensure optimal performance

Qualifications:

Required:

• Active TS/SCI clearance with Polygraph
• Bachelor’s degree or equivalent
• 7+ years of related experience
• Strong JavaScript proficiency, including object‑oriented JavaScript, jQuery, and modern client‑side frameworks
• Full‑stack experience with HTML and CSS, with the ability to quickly apply skills within a WordPress/PHP environment
• Demonstrated experience designing, developing, deploying, and maintaining functional web applications
• Solid understanding of UI principles, cross‑browser compatibility, and general web standards
• Experience implementing and maintaining web and application security best practices

Desired:

• Experience with web design, UI layout, color theory, and general visual design
• Background in WordPress development, including creating themes or plugins
• Experience with SharePoint development using SharePoint Designer
• Familiarity with Agile software methodologies
• Knowledge of SQL and experience with relational databases
• Exposure to cloud services and related tooling
• Understanding of DoD or Intelligence Community environments

This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions at CACI.

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:

$103,800 - $218,100