Sr. Frontend Developer at i3 in Chantilly, VA
- Company: i3
- Location: Chantilly, VA
- Posted: Sep 18, 2026
- Type: Full-time
- Experience: 8+ years
Overview
Title: Sr. Frontend Developer Work Location: Chantilly, VA Clearance Required: TS/SCI Senior Frontend Developer Location: Chantilly, VA — Hybrid Security Clearance: Active Top Secret clearance with SCI eligibility We are seeking a Senior Frontend Developer to design, build, and maintain intuitive us…
Job description
- Title: Sr. Frontend Developer
- Work Location: Chantilly, VA
- Clearance Required: TS/SCI
- Senior Frontend Developer
- Location: Chantilly, VA — Hybrid
- Security Clearance: Active Top Secret clearance with SCI eligibility
- We are seeking a Senior Frontend Developer to design, build, and maintain intuitive user interfaces that deliver exceptional user experiences and support enterprise application requirements.
- The ideal candidate will translate designs and business requirements into scalable frontend solutions, develop reusable UI components, and ensure application performance, accessibility, and cross-platform compatibility. This role combines hands-on development with mentorship, process improvement, cross-team collaboration, and secure software development practices.
Responsibilities
- Design, develop, and maintain responsive frontend applications using modern JavaScript frameworks.
- Translate business requirements and UX/UI designs into scalable, maintainable frontend solutions.
- Build reusable UI components and contribute to shared design systems and component libraries.
- Integrate frontend applications with RESTful APIs and backend services.
- Optimize application performance, accessibility, and compatibility across browsers and devices.
- Apply secure coding practices and support automated testing and CI/CD pipelines.
- Collaborate with designers, backend developers, security teams, and stakeholders to deliver reliable enterprise applications.
- Conduct code reviews, mentor developers, and promote frontend development best practices.
- Identify opportunities to improve development processes, code quality, and delivery efficiency.
Requirements
- Active Top Secret security clearance with SCI eligibility.
- Bachelor’s degree.
- Minimum 8 years of relevant software development experience.
- Ability to support a hybrid work schedule in Chantilly, VA.
- Strong experience with modern JavaScript frameworks such as React, Angular, Vue, or similar.
- Proficiency in HTML5, CSS3, JavaScript/TypeScript, and responsive design principles.
- Experience integrating frontend applications with RESTful APIs and backend services.
- Knowledge of accessibility standards, performance optimization, and secure coding practices.
- Experience with Git, automated testing frameworks, and CI/CD pipelines.
- Strong problem-solving, communication, and collaboration skills.
- Front End Programming — P4, Expert
- Web Development — P4, Expert
- DevSecOps — P3, Advanced
- Experience supporting cloud-native and containerized application environments.
- Knowledge of micro-frontend architectures and modern frontend development patterns.
- Experience with design systems and component libraries.
- Familiarity with Agile development methodologies.
- Experience applying DevSecOps practices to frontend development and delivery.
- Experience mentoring developers and leading frontend best-practice initiatives.
- Relevant certifications in web development, cloud platforms, or secure software development.
Skills
Required
- Bachelor’s degree
- Front End Programming — P4, Expert
- Web Development — P4, Expert
- DevSecOps — P3, Advanced