Senior UI/UX Engineer for Mission-Critical Interfaces

Leidos LLC; Gaithersburg (MD); On-site; USD 108,000 - 195,000; Full time

Job summary

Leidos is seeking a Sr. UI/IX Engineer to design and engineer modern, intuitive interfaces for mission-critical applications supporting an Intelligence Community customer.

You will translate complex requirements into responsive, accessible UI/IX solutions and partner with designers, product owners, and engineers in an Agile environment. Gaithersburg, MD is the primary location with opportunities across multiple sites.

Qualifications

• US citizenship is required per contract.
• Bachelor's degree with 8–12 years of experience or Master’s with 6–10 years.
• Active Top Secret/SCI with ability to pass a Polygraph.
• Strong experience developing modern web UIs and UX.
• Proficiency with HTML, CSS, JavaScript/TypeScript, and Python.
• Experience with React, Angular, Vue.js, or Django.
• Responsive, component-based front-end development.
• Experience in Agile/Scrum or SAFe environments.
• Strong communication and collaboration skills.
• Familiarity with CI/CD tools and Jira/Confluence.
• Cloud/AWS knowledge and Docker/Kubernetes familiarity.
• Understanding secure coding practices and government accreditation.

Responsibilities

• Lead design and engineering of modern, intuitive UI for mission-critical apps.
• Translate user needs into effective UI/IX solutions.
• Collaborate with product owners, designers, and engineers throughout the lifecycle.
• Develop reusable UI components and design standards for consistency.
• Apply user-centered design to simplify workflows and usability.
• Build prototypes and proof-of-concept interfaces for stakeholder validation.
• Ensure designs are implemented accurately with performance considerations.
• Evaluate interfaces to improve usability, accessibility, and responsiveness.
• Participate in Agile ceremonies and PI planning.
• Contribute to UI/IX engineering best practices and standards.
• Mentor less-experienced engineers and drive process improvements.

Skills

HTML/CSS/JavaScript

TypeScript

Python

Responsive design

User-centered design

Agile/Scrum/SAFe

Communication

Problem solving

Education

Bachelor's degree in Computer Science / Software Engineering / related field

Tools

React

Angular

Vue.js

Django

RESTful APIs

GitLab CI

Jenkins

Jira

Confluence

Docker

Kubernetes

AWS

Job description

Leidos is seeking a Sr. UI/IX Engineer to design and engineer modern, intuitive interfaces for mission-critical applications supporting an Intelligence Community customer.

You will translate complex requirements into responsive, accessible UI/IX solutions and partner with designers, product owners, and engineers in an Agile environment. Gaithersburg, MD is the primary location with opportunities across multiple sites.