Mid-Level UI/UX Developer

Leidos LLC; Gaithersburg (MD); On-site; USD 87,000 - 157,000; Full time

Job summary

Leidos is seeking a UI/UX Developer to craft intuitive, high-impact interfaces for mission-critical systems within the Intelligence Community. You’ll turn complex workflows into elegant user experiences, partnering with cross-functional teams to deliver capabilities that support national security.

In this role, you’ll contribute to design systems, front-end development with React/Angular, and usability best practices.

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related field required.
• Experience with front-end technologies (JavaScript, HTML, CSS).
• Experience with modern UI frameworks (React, Angular).
• Demonstrated ability to design user-centered interfaces for complex apps.

Responsibilities

• UI/UX Design & Implementation for web-based applications.
• User Experience Optimization to improve usability and adoption.
• Front-End Development using modern frameworks.
• Usability & Accessibility adherence and best practices.
• Design Systems contribution and maintenance of style guides.
• User Research & Feedback integration into designs.
• Cross-Functional collaboration with backend teams and stakeholders.
• Performance optimization of front-end interfaces.

Skills

JavaScript

HTML

CSS

React

Angular

Usability principles

Linux

Education

Bachelor’s degree in Computer Science/Software Engineering or related field

Master’s degree (with 2–6 years relevant experience)

Tools

Figma

Sketch

Adobe XD

Grafana

REST APIs

Job description

Ready to design technology that makes a difference? At Leidos, you’ll help shape the future of intelligence operations by creating intuitive, high-impact user experience for mission-critical systems. As a UI/UX Developer supporting a premier Intelligence Community customer, you’ll turn complex challenges into elegant solutions, working alongside innovative teams to deliver capabilities that strengthen national security. This is an opportunity to see your designs move beyond the screen and directly support real-world missions of national importance. Leidos Intelligence Sector combines technology-enabled services and mission software capabilities in the areas of cyber, logistics, security operations, and decision analytics to support our defense and intel customers’ mission to defend against evolving threats around the world. Our team’s focus is to ensure our customers have the right tools, technologies, and tactics to keep pace with an ever-evolving security landscape and succeed in their pursuit to protect people and critical assets.

Clearance Level Required

Active TS/SCI with the ability to successfully pass a Polygraph examination.

Essential Responsibilities

• UI/UX Design & Implementation: Design and develop intuitive, responsive user interfaces for web-based applications
• User Experience Optimization: Translate complex workflows into simple, efficient user experiences that improve usability and adoption
• Front-End Development: Build and maintain front-end components using modern frameworks (e.g., React, Angular, or similar)
• Usability & Accessibility: Ensure applications meet usability standards and accessibility best practices
• Design Systems: Contribute to and maintain consistent design patterns, components, and style guides
• User Research & Feedback: Gather and incorporate user feedback to continuously improve interface design and functionality
• Cross-Functional Collaboration: Work closely with backend engineers, product teams, and stakeholders to align UI/UX with system capabilities
• Performance Optimization: Improve front-end performance, responsiveness, and scalability

Basic Qualifications

• US citizenship is required per contract
• Bachelor’s degree in Computer Science, Software Engineering, or related field with 4–8 years of relevant experience or Master’s degree with 2–6 years of relevant experience
• Strong experience with front-end technologies (JavaScript, HTML, CSS)
• Experience with modern UI frameworks (React, Angular, etc.)
• Demonstrated experience designing user-centered interfaces for complex applications
• Understanding of UX principles, usability, and interaction design
• Experience working in Linux-based environments
• Ability to translate user needs into functional design solutions

Preferred Qualifications

• Experience with design tools (Figma, Sketch, Adobe XD)
• Experience with data visualization tools (e.g., Grafana or similar)
• Familiarity with REST APIs and backend integration
• Exposure to CI/CD pipelines and front-end deployment workflows
• Experience working in Agile environments
• Experience designing and developing intuitive user interfaces for data-driven GEOINT applications.

#Maru #NSBA

Pay Range

Pay Range: Pay Range $87,100.00 - $157,450.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.