Ui Engineering

Ui Engineering Design Jobs

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Today

Senior UI/UX Engineer

Leidos St. Louis, MO

St. Louis, MO

Today

$108k - $195k/yr Full time Senior Collaboration Design

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Job Description

Leidos is seeking a Senior UI/UX Engineer for the Chinook Program, supporting an Intelligence Community customer. The role focuses on designing and engineering modern, intuitive, responsive, accessible, and technically sound user interfaces for mission-critical applications within an Agile environment.

Role Overview

As a Senior UI/UX Engineer, you will lead the creation of user-centered UI/UX solutions that translate user needs, mission workflows, and functional requirements into effective interfaces. You will work across the development lifecycle with product owners, UX/UI designers, software engineers, systems engineers, and mission stakeholders to ensure usability and accurate implementation.

Responsibilities

Lead the design and engineering of modern, intuitive, and responsive user interfaces for mission-critical applications.
Translate user needs, mission workflows, and functional requirements into effective UI/IX 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 principles to simplify complex workflows and improve usability.
Build and refine interactive prototypes and proof-of-concept interfaces to validate concepts with stakeholders.
Partner with software engineering teams to ensure designs are implemented accurately and efficiently, with appropriate performance considerations.
Evaluate existing interfaces and identify opportunities to improve 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/IX engineering best practices, standards, and patterns.
Collaborate with test engineers to validate UI functionality and user workflows.
Provide technical mentorship and guidance to less-experienced engineers.
Support continuous improvement of the program’s UI/IX capabilities and development processes.

Required Qualifications

US citizenship required per contract.
Bachelor’s degree in Computer Science, Software Engineering, or related field with 8-12 years of relevant experience, or a Master’s degree with 6-10 years of relevant experience.
Active Top Secret/SCI with ability to 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
RMF, STIGs
Agile/Scrum, SAFe, PI Planning

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 using tools such as Playwright, Cypress, Selenium, or equivalent.
Experience mentoring engineers and providing technical leadership within a multidisciplinary Agile team.

Location and Employment Details

Location: St. Louis, MO (onsite)
Primary work locations: Gaithersburg, MD; Alexandria, VA; Chantilly, VA; Englewood, CO; St. Louis, MO; Tucson, AZ
Minimum experience: 6 years
Education: Master’s degree
Pay range: USD 107,900 - 195,050 per year

Benefits

Health and Wellness programs
Income Protection
Paid Leave
Retirement

Posting Date

Original posting date: August 21, 2026.

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10d ago

UI/UX Designer — Figma & React Design Systems

Operating Systems Inc. (OSI) Spring, TX

Spring, TX

10d ago

$75 - $90/hr Contract Collaboration Design Design Systems

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Job Description

Operating Systems Inc. (OSI) is building a modern engineering software platform that supports the marine, offshore, and structural engineering industries. This UI/UX Designer role centers on turning design intent into production-ready React frontends, with strong emphasis on Figma and design system thinking.

Working in a hybrid setup in Spring, TX 77389 on a contract basis, you will move quickly from business requirements to high-fidelity prototypes, help stakeholders review the work, and connect Figma components and tokens to a scalable React component library.

Role focus

Figma to production React: bridge design to production React/TypeScript frontends.
Design systems approach: think in reusable components, variants, and tokens rather than one-off screens.
Technical UI orientation: support complex, data-dense interfaces aligned with engineering workflows.

Responsibilities

Operate as a UI/UX Designer who is deeply proficient in Figma and experienced in bridging design to production React frontends.
Translate business requirements quickly into high-fidelity prototypes.
Apply design system thinking to interfaces, not isolated layouts.
Understand how engineers work in 3D CAD and simulation environments.
Deliver high-fidelity clickable prototypes for stakeholder review.
Present design rationale using tools such as FigJam, Miro, or PowerPoint.

Requirements

Expert-level Figma proficiency, including component libraries, auto layout, variables, interactive prototyping, design tokens, and branching/versioning workflows.
Figma design system management, including building and maintaining scalable design systems with variants, nested components, and token-based theming that maps cleanly to React component libraries.
Figma-to-React pipeline experience, including hands-on use of code generation and handoff tooling such as Locofy, Anima, Builder.io, or Figma Dev Mode to produce production-quality React/TypeScript output. Ability to structure Figma files so generated code stays clean and maintainable.
Figma AI features experience, such as AI-powered asset search, rename layers, visual suggestions, first drafts, plus third-party AI plugins to accelerate design workflows.
Strong UI/UX fundamentals, including information architecture, interaction design, user flows, wireframing, usability testing, and accessibility (WCAG 2.1 AA).
Front-end design literacy, including working knowledge of HTML, CSS, and React component architecture. Ability to inspect and red-line designs for developers. Familiarity with CSS-in-JS, Tailwind, or styled-components is a plus.
Data-dense and technical UI experience designing complex interfaces such as dashboards, data tables, tree views, property panels, and multi-step workflows.
Rapid business-requirements translation from engineers and product managers into clear interaction models and visual designs.
Prototyping and stakeholder communication through high-fidelity clickable prototypes and clear rationale, using tools such as FigJam, Miro, or PowerPoint.

Technologies

Figma, React, TypeScript
Locofy, Anima, Builder.io, Figma Dev Mode
FigJam, Miro, PowerPoint
HTML, CSS, CSS-in-JS, Tailwind, styled-components
Storybook, Tokens Studio, Style Dictionary, Chromatic, Zeplin
WCAG 2.1 AA

Highly desirable skills

Engineering/CAD/3D domain experience, including software used in engineering design, structural modeling, CAD/CAM/CAE, simulation, or technical/scientific applications.
Marine or offshore engineering software familiarity, including shipbuilding, classification, or structural engineering workflows and terminology.
Design system ↔ component library synchronization, such as keeping a Figma system in sync with a live React component library (for example via Storybook integration and token pipelines with Style Dictionary or Tokens Studio).
Responsive and adaptive layout design, including experience across desktop, web, and potentially embedded/offline deployments.
Motion and micro-interaction design to specify meaningful transitions and usability improvements in complex workflows.
Modern design/dev collaboration tools such as Storybook, Chromatic, Zeplin, or similar.

Experience and fit

3+ years of professional UI/UX design experience, with at least 2 years focused primarily on Figma.
Portfolio demonstrating complex, data-rich application design (not only websites or mobile consumer apps).
Demonstrated experience delivering designs that were implemented in React-based front-end applications.

Pay and logistics

Pay: USD 75 - 90 per hourly
Job type: Contract
Location: Spring, TX 77389 (hybrid)

Benefits

401(k)
401(k) matching
Dental insurance
Health insurance
Life insurance
Vision insurance
Company paid medical insurance; optional coverage available for spouse and children
Long term Disability
401K
Workers Compensation Insurance

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Ui Engineering Design Jobs

Senior UI/UX Engineer

UI/UX Designer — Figma & React Design Systems

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