Senior UI/UX Engineer

Leidos is hiring a Senior UI/UX Engineer to support the Chinook Program for an Intelligence Community customer in Englewood, CO (onsite). This role focuses on designing and engineering modern user interfaces that are mission-critical, responsive, and accessible, while partnering closely with cross-functional teams in a collaborative Agile environment.

What you’ll do

• Lead the design and engineering of modern, intuitive, and responsive UI for mission-critical applications.
• Translate user needs, mission workflows, and functional requirements into effective UI/UX solutions.
• Collaborate with product owners, UX/UI designers, software engineers, systems engineers, and mission stakeholders across the development lifecycle.
• Develop reusable UI components, patterns, and design standards to improve consistency and maintainability across the program.
• Apply user-centered design to simplify complex workflows and improve usability.
• Create and refine interactive prototypes and proof-of-concept interfaces to validate concepts with stakeholders.
• Partner with engineering teams to ensure designs are implemented accurately, efficiently, and with appropriate performance considerations.
• Assess existing interfaces and identify improvements across usability, accessibility, responsiveness, and overall user experience.
• 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.
• Work with test engineers to ensure UI functionality and user workflows are thoroughly validated.
• Provide technical mentorship and guidance to less-experienced engineers.
• Drive continuous improvement of the program’s UI/UX capabilities and development processes.

What you bring

• US citizenship is required per contract.
• Education: Master’s degree (or Bachelor’s in Computer Science/Software Engineering/related field).
• Experience: 6+ years minimum; additional combination requirements include Bachelor’s with 8-12 years 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 experience developing modern web-based UI/UX.
• 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.
• Ability to translate complex requirements and user workflows into intuitive interface solutions.
• Experience working in Agile/Scrum or SAFe environments.
• 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 AWS (C2S or GovCloud) and container technologies such as Docker and Kubernetes.
• Understanding of secure coding practices and government system accreditation processes (e.g., RMF, STIGs).

Technologies you may use

HTML, CSS, JavaScript, TypeScript, Python, React, Angular, Vue.js, Django, GitLab CI, Jenkins, JIRA, Confluence, AWS (C2S or GovCloud), Docker, Kubernetes, RMF, STIGs, CI/CD, Agile/Scrum, SAFe, Polygraph, Top Secret/SCI

Benefits

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

Pay Range: $107,900.00 - $195,050.00 per year

Clearance level required: Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

Original posting date: August 21, 2026