UI/UX Designer

Uni Systems

. Translate business and user requirements into intuitive, accessible, and visually coherent user interface solutions.

Posted 10/22/2026full-timeBrussels • BelgiumSeniorLeadWebsite

Core Competencies

Role fit

Core Competencies

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Expertise in UI/UX design and web interface development, with a strong focus on user-centered design methodologies, accessibility compliance, and responsive design. Proficient in creating wireframes, mock-ups, and interactive prototypes while collaborating effectively with cross-functional teams.

Highest-signal resume keywords

UI/UX DesignWireframing And PrototypingWCAG ComplianceResponsive Web DesignUser-Centered Design Methodologies

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

HTML5CSS3JavaScriptFigmaAdobe PhotoshopAdobe XDIllustratorReactAngularVue.js

Soft Skills

CollaborationCommunicationAnalytical ThinkingProblem SolvingUser Advocacy

Tools & Technologies

ConfluenceJiraDesign SystemsCMS Front-End ThemingAccessibility Tools

Industry Keywords

Usability TestingUser Journey MappingData Protection PrinciplesSEO Best PracticesAgile Methodologies

Tech Stack

Tools & technologies

AngularDrupalJavaScriptReactSCSSVue.jsWordPress

About the role

Key responsibilities & impact

Translate business and user requirements into intuitive, accessible, and visually coherent user interface solutions.
Analyze user journeys and interface requirements through heuristic reviews, task analysis, and analytics-based insights.
Create wireframes, mock-ups, and low- to high-fidelity interactive prototypes.
Design responsive web and mobile interfaces, information architecture, navigation patterns, and interaction workflows.
Develop and maintain design system components, style guides, and graphical assets.
Plan and conduct usability evaluations and user testing, documenting findings and actionable recommendations.
Define UI acceptance criteria and test scenarios, ensuring WCAG compliance and compatibility across browsers, devices, and screen sizes.
Prepare developer handoff deliverables and collaborate with developers and accessibility experts for accurate implementation.

Requirements

What you’ll need

Master’s degree in information technology and a minimum of 15 years of relevant professional experience, or Bachelor's degree in Information Technology and a minimum of 17 years of relevant professional experience.
Very good command of English (Level B2 or higher), both written and spoken, according to the Common European Framework of Reference for Languages (CEFR).
Minimum 15 years of professional experience in UI/UX design and web interface development.
Proven experience applying user-centered design methodologies, including UX research, persona creation, user journey mapping, and user story analysis.
Experience planning, conducting, and evaluating usability tests, including remote testing, A/B testing, and hallway testing.
Strong experience creating wireframes, mock-ups, and interactive prototypes using Figma or similar design and prototyping tools.
Experience using graphic design tools such as Adobe Photoshop, Adobe XD, Illustrator, or equivalent solutions.
Proven experience developing responsive and user-friendly interfaces using HTML5, CSS3/SCSS, and JavaScript.
Experience working with modern front-end frameworks such as React, Angular, or Vue.js.
Experience performing responsive design validation and cross-browser compatibility testing across multiple devices and platforms.
Strong knowledge of W3C standards, web ergonomics, and SEO best practices related to interface design and development.
Proven experience designing accessible interfaces in compliance with WCAG accessibility standards.
Experience applying data protection, privacy, and security principles within UI/UX design activities.
Experience creating, maintaining, and governing design systems, including style guides, design tokens, and reusable component libraries.
Experience working in Agile environments and using collaboration tools such as Confluence and Jira.
Experience preparing design specifications, documentation, and developer handoff deliverables.
Ability to collaborate effectively with developers, business stakeholders, and accessibility experts to ensure accurate implementation of design solutions.
Experience with institutional design systems or CMS front-end theming platforms (e.g., Drupal or WordPress) will be considered an asset.
Experience working within an international public institution is highly desirable.
Equal employment opportunities; no discrimination on grounds including gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, or sexual orientation.