Senior Frontend Engineer — Top Secret Clearance | Hybrid (Chantilly)

i3 Consulting; Chantilly (VA); Hybrid; USD 120,000 - 180,000; Full time

Job summary

i3 Consulting in Chantilly, VA is seeking a Senior Frontend Developer to design, build, and maintain enterprise-grade user interfaces using modern JavaScript frameworks. The role blends hands-on development with mentorship, focusing on performance, accessibility, and secure software practices.

You will translate designs into scalable frontend solutions, build reusable UI components, integrate with RESTful services, and collaborate across design, backend, and security teams to deliver reliable

Qualifications

• Active Top Secret security clearance with SCI eligibility.
• Bachelor’s degree.
• 8 years of relevant software development experience.
• Hybrid work schedule in Chantilly, VA.
• Experience with React, Angular, Vue or similar.
• Proficiency in HTML5, CSS3, JavaScript/TypeScript, and responsive design.
• 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.

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.

Skills

React/Angular/Vue

HTML5/CSS3/JS/TS

Responsive design

Accessibility

Git

CI/CD pipelines

Secure coding practices

Education

Bachelor’s degree

Job description

i3 Consulting in Chantilly, VA is seeking a Senior Frontend Developer to design, build, and maintain enterprise-grade user interfaces using modern JavaScript frameworks. The role blends hands-on development with mentorship, focusing on performance, accessibility, and secure software practices.

You will translate designs into scalable frontend solutions, build reusable UI components, integrate with RESTful services, and collaborate across design, backend, and security teams to deliver reliable