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Leidos

Senior UI/UX Engineer

Leidos
Tucson, AZ $108k - $195k/yr Full time Posted 1d ago
Senior Angular Collaboration Design Design Systems Experience Design Front End Engineer Frontend Interaction Design JavaScript React Ui Design Ux Design Visual Design Vue.js Web
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Job Description

Leidos is seeking a Senior UI/UX Engineer to support the Chinook Program and an Intelligence Community customer. In this role, you will design and engineer modern user interfaces that are responsive, accessible, and built for mission-critical applications within a collaborative Agile environment.

Working alongside product owners, UX/UI designers, software and systems engineers, and mission stakeholders, you will translate mission workflows and functional requirements into interface solutions while mentoring other engineers and helping strengthen program UI/UX capabilities.

Role Focus

  • Lead design and engineering of modern, intuitive, responsive interfaces for mission-critical applications.
  • Translate user needs, mission workflows, and functional requirements into effective UI/UX solutions.
  • Apply user-centered design principles to simplify complex workflows and improve usability.
  • Develop reusable UI components, patterns, and design standards to support consistency and maintainability across the program.
  • Build and refine interactive prototypes and proof-of-concept interfaces to validate concepts with stakeholders.
  • Evaluate existing interfaces and identify opportunities to improve usability, accessibility, responsiveness, and overall user experience.

Collaboration and Delivery

  • Partner with software engineering teams to help ensure designs are implemented accurately, efficiently, and with appropriate performance considerations.
  • Collaborate with product owners, UX/UI designers, systems engineers, and mission stakeholders across the development lifecycle.
  • Work with test engineers to ensure UI functionality and user workflows are thoroughly validated.
  • Participate in Agile ceremonies including PI Planning, backlog refinement, sprint planning, demonstrations, and retrospectives.
  • Contribute to technical discussions and help establish UI/UX engineering best practices, standards, and patterns.

Technical Mentorship

  • Provide technical mentorship and guidance to less-experienced engineers.
  • Help drive continuous improvement of the program’s UI/UX capabilities and development processes.

Required Qualifications

  • US citizenship is required per contract.
  • Bachelor’s degree in Computer Science, Software Engineering, or related field with 8-12 years of prior relevant experience, or Master’s with 6-10 years of prior relevant experience.
  • Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.
  • Strong professional experience developing modern web-based user interfaces and user experiences.
  • Proficiency with HTML, CSS, JavaScript/TypeScript, and Python.
  • Experience with modern UI frameworks such as React, Angular, Vue.js, or Django.
  • Demonstrated understanding of responsive design, component-based development, and modern front-end engineering practices.
  • Experience translating complex requirements and user workflows into intuitive interface solutions.
  • Experience working in an Agile/Scrum or SAFe environment.
  • Strong communication and collaboration skills across technical and non-technical teams.
  • Strong analytical and problem-solving skills for complex technical and user-experience challenges.
  • Experience with CI/CD tools (GitLab CI, Jenkins) and agile collaboration tools (JIRA, Confluence).
  • Familiarity with cloud environments such as AWS (C2S or GovCloud) and containerization technologies (Docker, Kubernetes).
  • Understanding of secure coding practices and government system accreditation processes (e.g., RMF, STIGs).

Technologies

  • HTML, CSS, JavaScript, TypeScript, Python
  • React, Angular, Vue.js, Django
  • GitLab CI, Jenkins, JIRA, Confluence
  • AWS (C2S or GovCloud), Docker, Kubernetes

Benefits

  • Health and Wellness programs
  • Income Protection
  • Paid Leave
  • Retirement

Pay and Location

  • Pay Range: USD 107,900 - 195,050 per yearly
  • Location: Tucson, AZ (onsite)
  • Other possible work locations (program locations): Gaithersburg, MD; Alexandria, VA; Chantilly, VA; Englewood, CO; St. Louis, MO; Tucson, AZ

Clearance Level Required

  • Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

Preferred Qualifications

  • Experience supporting Intelligence Community, DoD, or other mission-focused government programs.
  • Experience on applications involving complex data visualization, geospatial information, intelligence workflows, or mission systems.
  • Experience with React and TypeScript and modern front-end development tooling.
  • Experience developing or consuming RESTful APIs and integrating UI applications with backend services.
  • Experience with design systems, reusable component libraries, and UI standards.
  • Familiarity with Figma, Adobe XD, Sketch, or similar UX/UI design tools.
  • Experience with accessibility standards such as Section 508/WCAG.
  • Experience developing dashboards, data visualization, maps, or highly interactive mission interfaces.
  • Experience working within a cloud-based environment, particularly AWS.
  • Experience with automated UI testing tools such as Playwright, Cypress, Selenium, or equivalent.
  • Experience mentoring engineers and providing technical leadership within a multidisciplinary Agile team.

Original Posting: August 21, 2026

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