Sr. Frontend Developer

i3, LLC; Chantilly (VA); Hybrid; USD 150,000 - 190,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

i3, LLC is seeking a Senior Frontend Developer in Chantilly, VA with an active Top Secret clearance and SCI eligibility. The role focuses on designing, building, and maintaining enterprise-grade frontend interfaces with scalable UI components and secure coding practices.

You will collaborate across teams, mentor peers, and help establish design systems while delivering high-performance, accessible web applications in a hybrid work environment.

Qualifications

• Active Top Secret security clearance with SCI eligibility.
• Bachelor's degree.
• 8+ years of software development experience.
• Hybrid work schedule in Chantilly, VA.
• Experience with modern JavaScript frameworks (React/Angular/Vue).
• Proficiency in HTML5, CSS3, JavaScript/TypeScript, and responsive design.
• Experience integrating frontend apps with RESTful APIs and backend services.
• Git, automated testing, and CI/CD pipelines.
• Strong problem-solving and collaboration skills.

Responsibilities

• Design, develop, and maintain responsive frontend applications with modern JavaScript frameworks.
• Translate requirements and designs into scalable frontend solutions.
• Build reusable UI components and contribute to design systems.
• Integrate frontend with RESTful APIs and backend services.
• Optimize performance, accessibility, and cross-browser compatibility.
• Apply secure coding practices and support automated testing/CI/CD.
• Collaborate with designers, backend developers, security teams, and stakeholders.
• Conduct code reviews and mentor developers.
• Identify opportunities to improve development processes and code quality.

Skills

Frontend development

Web development

DevSecOps

Education

Bachelor's degree

Tools

React

Angular

Vue

HTML5

CSS3

TypeScript

REST APIs

Git

CI/CD

Job description

Senior Frontend Developer

Location: Chantilly, VA --- Hybrid

Security Clearance: Active Top Secret clearance with SCI eligibility

Position Overview

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.

Key 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.

Required Qualifications

• 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.

Required Technical Proficiency

• Front End Programming --- P4, Expert
• Web Development --- P4, Expert
• DevSecOps --- P3, Advanced

Preferred Qualifications

• 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.