Senior Frontend Engineer — Secure, Hybrid, TS/SCI Eligible

i3; Chantilly (VA); Hybrid; USD 120,000 - 170,000; Full time

Job summary

i3 is seeking a Senior Frontend Developer in Chantilly, VA, offering a hybrid work arrangement and requiring an active Top Secret clearance with SCI eligibility. The role focuses on designing, building, and maintaining enterprise-grade UIs that deliver strong user experiences and meet security requirements.

You will translate designs into scalable frontend solutions, create reusable components, and ensure performance, accessibility, and cross‑platform compatibility while mentoring teammates and

Qualifications

• Active Top Secret security clearance with SCI eligibility.
• Bachelor’s degree in a related field.
• 8+ years of software development experience.
• Hybrid work schedule in Chantilly, VA.
• Strong experience with React, Angular, Vue or similar.
• Proficiency in HTML5, CSS3, JavaScript/TypeScript.
• Experience integrating frontend 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

Security clearance

Frontend development

JavaScript/TypeScript

RESTful APIs

CI/CD

Education

Bachelor’s degree

Tools

React

Angular

Vue

HTML5/CSS3

TypeScript

Git

CI/CD pipelines

Job description

i3 is seeking a Senior Frontend Developer in Chantilly, VA, offering a hybrid work arrangement and requiring an active Top Secret clearance with SCI eligibility. The role focuses on designing, building, and maintaining enterprise-grade UIs that deliver strong user experiences and meet security requirements.

You will translate designs into scalable frontend solutions, create reusable components, and ensure performance, accessibility, and cross‑platform compatibility while mentoring teammates and