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Junior Software Engineer - TS/SCI with Poly - Careers at Leidos

Leidos

Junior Software Engineer - TS/SCI with Poly - Careers at Leidos

full-timePosted: Feb 3, 2026

Job Description

Join Leidos as a Junior Software Engineer in Chantilly, VA

Leidos is seeking a motivated Junior Software Engineer with TS/SCI and Poly clearance to develop modern web applications using React.js. Ideal for recent graduates or early-career professionals passionate about front-end development in a dynamic, mission-critical environment.

Primary Responsibilities

  • Build and maintain user-facing React.js features, including reusable components and state management with hooks like useState and useEffect.
  • Convert UI/UX designs and wireframes into high-quality, responsive code using HTML5, CSS3, and ES6+ JavaScript.
  • Collaborate with backend teams to integrate RESTful APIs for seamless data flow.
  • Leverage AI tools (GitHub Copilot, Cursor, Claude) for efficient code generation, debugging, refactoring, and prompt engineering.
  • Conduct code reviews, unit testing, and debugging to ensure cross-browser/device compatibility and performance.
  • Write clean, modular code adhering to team standards in an Agile setting with stand-ups and sprint planning.
  • Stay ahead of front-end trends and AI-assisted development practices.

Basic Qualifications

  • Bachelor's +1 year experience (or equivalent).
  • Active TS/SCI with Poly; US Citizen.
  • Proficiency in JavaScript (ES6+), HTML5, CSS3; React fundamentals.
  • Git experience; interest in AI coding tools.
  • Responsive design knowledge; CompTIA Security+.
  • Team player with strong problem-solving and communication.

Preferred Qualifications

  • npm/Yarn/Vite; TypeScript/Redux basics.
  • REST API exposure; GitHub portfolio or projects.

Pay Range: $57,850 - $104,575 USD. Original posting Dec 30, 2025. Leidos solves high-stakes problems with innovative code and AI. Apply now!

Locations

  • Chantilly, Virginia, United States

Salary

57,850 - 104,575 USD / yearly

Estimated Salary Rangehigh confidence

57,850 - 104,575 USD / yearly

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • React.jsintermediate
  • JavaScript (ES6+)intermediate
  • HTML5intermediate
  • CSS3intermediate
  • Gitintermediate
  • AI Coding Tools (GitHub Copilot, Claude)intermediate
  • Responsive Designintermediate
  • RESTful APIsintermediate

Required Qualifications

  • Bachelor's degree with 1+ years experience or equivalent (experience)
  • Active TS/SCI with Poly clearance (experience)
  • CompTIA Security+ certification (experience)
  • US Citizenship (experience)
  • Fundamental React.js knowledge (components, hooks) (experience)
  • Strong problem-solving and communication skills (experience)

Responsibilities

  • Develop React.js user-facing features and reusable components
  • Translate UI/UX designs into responsive HTML5/CSS3/JS code
  • Integrate RESTful APIs with backend developers
  • Utilize AI tools for code generation, debugging, and refactoring
  • Participate in Agile processes, code reviews, and unit testing

Benefits

  • general: Competitive salary $57,850-$104,575
  • general: Mission-focused environment with growth opportunities
  • general: Hands-on experience with modern web tech and AI tools
  • general: Agile team collaboration and daily stand-ups
  • general: Professional development in high-stakes defense projects

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Leidos logo

Junior Software Engineer - TS/SCI with Poly - Careers at Leidos

Leidos

Junior Software Engineer - TS/SCI with Poly - Careers at Leidos

full-timePosted: Feb 3, 2026

Job Description

Join Leidos as a Junior Software Engineer in Chantilly, VA

Leidos is seeking a motivated Junior Software Engineer with TS/SCI and Poly clearance to develop modern web applications using React.js. Ideal for recent graduates or early-career professionals passionate about front-end development in a dynamic, mission-critical environment.

Primary Responsibilities

  • Build and maintain user-facing React.js features, including reusable components and state management with hooks like useState and useEffect.
  • Convert UI/UX designs and wireframes into high-quality, responsive code using HTML5, CSS3, and ES6+ JavaScript.
  • Collaborate with backend teams to integrate RESTful APIs for seamless data flow.
  • Leverage AI tools (GitHub Copilot, Cursor, Claude) for efficient code generation, debugging, refactoring, and prompt engineering.
  • Conduct code reviews, unit testing, and debugging to ensure cross-browser/device compatibility and performance.
  • Write clean, modular code adhering to team standards in an Agile setting with stand-ups and sprint planning.
  • Stay ahead of front-end trends and AI-assisted development practices.

Basic Qualifications

  • Bachelor's +1 year experience (or equivalent).
  • Active TS/SCI with Poly; US Citizen.
  • Proficiency in JavaScript (ES6+), HTML5, CSS3; React fundamentals.
  • Git experience; interest in AI coding tools.
  • Responsive design knowledge; CompTIA Security+.
  • Team player with strong problem-solving and communication.

Preferred Qualifications

  • npm/Yarn/Vite; TypeScript/Redux basics.
  • REST API exposure; GitHub portfolio or projects.

Pay Range: $57,850 - $104,575 USD. Original posting Dec 30, 2025. Leidos solves high-stakes problems with innovative code and AI. Apply now!

Locations

  • Chantilly, Virginia, United States

Salary

57,850 - 104,575 USD / yearly

Estimated Salary Rangehigh confidence

57,850 - 104,575 USD / yearly

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • React.jsintermediate
  • JavaScript (ES6+)intermediate
  • HTML5intermediate
  • CSS3intermediate
  • Gitintermediate
  • AI Coding Tools (GitHub Copilot, Claude)intermediate
  • Responsive Designintermediate
  • RESTful APIsintermediate

Required Qualifications

  • Bachelor's degree with 1+ years experience or equivalent (experience)
  • Active TS/SCI with Poly clearance (experience)
  • CompTIA Security+ certification (experience)
  • US Citizenship (experience)
  • Fundamental React.js knowledge (components, hooks) (experience)
  • Strong problem-solving and communication skills (experience)

Responsibilities

  • Develop React.js user-facing features and reusable components
  • Translate UI/UX designs into responsive HTML5/CSS3/JS code
  • Integrate RESTful APIs with backend developers
  • Utilize AI tools for code generation, debugging, and refactoring
  • Participate in Agile processes, code reviews, and unit testing

Benefits

  • general: Competitive salary $57,850-$104,575
  • general: Mission-focused environment with growth opportunities
  • general: Hands-on experience with modern web tech and AI tools
  • general: Agile team collaboration and daily stand-ups
  • general: Professional development in high-stakes defense projects

Target Your Resume for "Junior Software Engineer - TS/SCI with Poly - Careers at Leidos" , Leidos

Get personalized recommendations to optimize your resume specifically for Junior Software Engineer - TS/SCI with Poly - Careers at Leidos. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Junior Software Engineer - TS/SCI with Poly - Careers at Leidos" , Leidos

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

Jobs in Chantilly, VALeidos CareersSoftware EngineeringCleared JobsHiring in United StatesEngineeringInformation TechnologySecurity

Answer 10 quick questions to check your fit for Junior Software Engineer - TS/SCI with Poly - Careers at Leidos @ Leidos.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.